So what I did here?
I increased by half her Duration, doubled up her Strength, and increased my Range by over half.
Thanks to all the above, I got 1000 Damage from Shrapnel Vortex and the same amount of Shield from Shield Satellites.
Duration for both grenades type is 20.9s. With over halved Range I got 8,8 m vortex and pickup radius. This skill is cheap and very useful, so keep using it.
Same Damage (1000 Heat Damage +100% Damage per hit) from [Blaze] Artillery and Duration is 4.8s, so enough to [Reach] x20 counter if there are enough enemies around.
Her Dispensary Duration is 40.1s, and it has 50% extra pickup drop chance. Kinda useful skill but also kinda expensive... buuuuut it gives back what it takes with a chance to give even more.
Worth to mention: Universal Ammo Pack restores Atmospheric Archgun ammo and cooldown upon collection. This might be a nice addition with Arcane Tanker. Keep that in mind.
I did change her horrible 4th skill with Ensnare ([Khora]'s skill) to catch enemies and keep them in one place, so my other skills can easily [Shred] them to pieces.
According to the Wiki, the [Protea] playstyle is a continuous and repetitive pattern that gives us Energy in exchange for consuming it. So playing her is quite active and may seem quite complicated to some.
After casting three abilities, [Protea] empowers her next ability cast with an additive 100% Ability Strength bonus.
look kinda overpowered.
Just imagine, you cast Ensnare , then you cast her Dispensary, then her [Blaze] Artillery and the next ability going to be empowered with +100% Strength... well let us cast Grenade Fan with 325% Power Strength!
Suggested Arcanes are Energize and... whatever you choose, it can be something to boost your Damage or Critical Chance/Damage or something to help you survive, i.e. Aegis/Barrier or Deflection/Resistance. In this case, I choose Barrier for Shield Gating. You can even pick Tanker and find a nice synergy with her Dispensary skill.
(Archgun with Gravimag installed on it is required).