General Use [Protea] build with highly active playstyle utilizing her entire kit with a focus on Temporal Anchor, with Shield Satellite for shield gating/restore, Shrapnel Vortex for minor crowd control, Blaze Artillery for damage, dispensary for energy restoration and ammo recovery and finally Temporal Anchor for armor strip/grouping/nuking/i-frames.
Temporal Anchor is an often under-estimated ability that actually has multiple useful effects:
SCALING NUKE: It stores damage dealt (25% per instance of damage) with NO limit, meaning if you deal enough damage to enemies with a combination of weapons and [Blaze] Artillery, you can potentially hit damage cap and deal this same amount of damage in a 35+m radius (line of sight) upon ending.
I-FRAMES AND STATUS CLEANSE: Casting 4 initially gives 3s of i-frames and ending 4 gives free status cleanse (effectively a [Rolling Guard]).
GROUPING: Ending 4 creates an implosion effect that ragdolls and groups enemies in a big radius (15m at base), but dependent on line of sight.
REWIND: Any energy or ammo spent during the anchor is refunded upon rewind. Note, since dispensary exists, this is actually NOT a very useful thing since you also LOSE any energy/ammo gained via dispensary during the anchor period. This means it is ideal to cast 4 only while at max energy and to cast as much as possible without picking up any orbs before rewinding. This may require you to establish a 'dispensary zone' that is not in the same location as where you plan on using anchor/rewind.
EXTRA LIFE: Taking lethal damage during the anchor causes you to lose health to 5% max but regain shields to initial levels.
ARMOR STRIP: The [Temporal Erosion] augment allows any damage via 1 or 2 to strip armor. The speed of armor strip can occur quite rapidly if casts of 1 and 2 are stacked, and has very few of the limitations of other armor strip subsumes (i.e. does not need excessive strength like pillage, works on acolytes/demolysts unlike terrify/fireblast, technically has insane range matching the range of [Blaze] artillery which is approximately 70m at 235% range, works basically passively).
Variants
Semi AFK Mecha Roar: https://overframe.gg/build/668069
SPECIAL NOTES:
Ability rotation to make use of passive. We want the +100% passive to apply to the cast of 4 so it strips 20% armor per hit (allowing full strip in about 4-5 shots of blaze artillery or roughly 2s with two turrets active).
Short Anchor Grouping combo:
Long Anchor Passive Strip combo:
Duration
Duration is important for the length of [Blaze] Artillery. The longer [Blaze] Artillery lasts for, the more its damage ramps up by the end of the duration. Duration is also helpful for shield satellite uptime and total dispensary drops. Primed Continuity with Constitution and 2-3 Crimson duration shards can get the duration to > 200%.
Efficiency
[Protea] is a very cast heavy frame that requires 4 ability casts to make use of her amazing bonus 100% str passive. You will be casting multiple blazing artillery turrets that last a short period of time. Usually 45% efficiency is fine with dispensary, however, Temporal Anchor has a very expensive cost and if you want to use this for frequent grouping or nuking you might want to keep either neutral or even positive efficiency. If you subsume OVER Temporal Anchor with an alternative grouping ability then you should be very comfortable running [Blind Rage] and dropping efficiency to 45%.
Range
High range is great for the radius of Grenade Fan Shrapnel Vortex (which affects passive armor strip ultimately), implosion radius and nuke radius of Temporal Anchor and range of [Blaze] Artillery (which is very high at base). You could swap [Stretch] for [Blind Rage] if you prefer.
Strength
Strength is used for shield gain, [Blaze] Artillery damage, extra drop chance from Dispensary and damage conversion + armor strip of Temporal Anchor. We don't need ridiculous amounts of strength as all her abilities still work well without strength, and [Protea] even has a passive that provides 100% extra strength to every 4th cast. [Growing Power] + Molt Augmented + passive brings her effective maximum strength to 225%. There are multiple other sources of free strength externally too, such as Madurai/Zenurik, [Grimoire] mods, [Nidus] Specter, Pax Bolt.
Flexible Slots
[Blind Rage]: you can slot this over [Stretch] or [Constitution] if you are okay with the negative efficiency.
Why Rank 0 [Archon Vitality]?
This is personal preference, but if you are shield gating you don't really need health and only need [Archon Vitality] for the extra heat proc effect for [Blaze] Artillery. Note, this is only effectively approximately 30% overall DPS boost to [Blaze] Artillery as the majority of damage is still dealt by the raw hits (unless you use Heat Inherit). If you feel you don't need this, you can swap this out for more strength (e.g. [Blind Rage], [Umbral Intensify]) or [Natural Talent].
AVOID Augur mods
Using Augur mods on your setup could potentially overwrite the long shield gate provided by Shield Satellite (currently 5s), since casting 2, 3, 4 during the 5s gate regenerates a tiny amount of shield and subsequently taking damage during that time now gives you a very small gate instead.
Aura
Exilus
Completely flexible and up to you.
Primed sure footed to prevent knockdowns. Handspring could be alternative.
Archon Shards
1 or 2 Tauforged Amber Cast speed - important for speeding temporal anchor activation animation and shield satellite recast.
3 or 4 Tauforged Crimson Duration shards - scales the [Blaze] Artillery duration
Dispensary and Temporal Anchor are both potential subsume slots. If you run external energy eg (Arcane Steadfast + [Equilibrium] + [Synth Deconstruct] or [Grimoire]) with about 100% efficiency, you should be able to sustain energy without Dispensary. Alternatively if you don't enjoy using Temporal Anchor at all then you can just subsume over 4 (and swap [Constitution] or [Stretch] for [Blind Rage]).
Grouping
Greatly increases the damage ramp up of [Blaze] Artillery since each shot can hit multiple enemies at once, while also providing a form of crowd control. While Temporal Anchor does provide innate grouping that is of higher range than all the subsumable options, the casting process can be quite awkward to use.
Armor strip
Greatly improves the scaling of Blaze Artillery, meaning you can run long endurance and even levelcap using Blaze Artillery if you full-strip armor, assuming you don't run an alternative tool for armor strip such as [Latron] incarnon or Unairu. [Temporal Erosion] now gives Temporal Anchor inbuilt armor strip. If you don't enjoy using Temporal Anchor, then you can subsume a helminth option instead over it:
Crowd Control
Greatly improves Protea's survivability by preventing enemies from shooting you
Vazarin - gives protective sling for 5s i-frames (without cooldown) and void snare gives free low range grouping without a subsume.
Madurai - gives 50% bonus cast speed and 40% bonus power strength
Heat Inherit Primer
Heat Inherit refers to using a primer to create an initial heat proc, which then allows subsequent heat procs to benefit from heat mods and faction mods on the primer.
An AOE Heat Inherit primer can increase [Blaze] Artillery DPS but only if you manage to shoot them with your primer first before a turret hits them with a heat proc.
Prob Cernos can both group and prime: https://overframe.gg/build/489561/
Epitaph: https://overframe.gg/build/376162/epitaph/heat-inherit-primer-epitaph/
Bubonico: https://overframe.gg/build/345432/bubonico/heat-inherit-primer-shotgun/
DPS Weapons
Latron Incarnon can also AOE prime viral and full strip, best used with grouping: https://overframe.gg/build/463858/latron-prime/latron-incarnon-viral-heat-armor-strip-primer/
Kuva Tonkor - Protea deluxe skin is one of the nicest skins in the game and comes with an amazing matching Tonkor skin: https://overframe.gg/build/451007/
Companions
Nautilus - passive grouping which is excellent for Blaze Artillery: https://overframe.gg/build/540870/
Diriga - passive viral priming for increasing damage and proccing synth deconstruct to make more health orbs for Equilibrium: https://overframe.gg/build/541464/