GUIDE

You need 2 Umbra forma, one for each ass cheek. If you really need to run [Adaptation] because you're super used to running it, then you may need 1 extra forma or even 1 extra umbra forma, xD, just to fit [Adaptation] into the flex slot. But everyone will respect your [Wisp] for having 3 umbra forma because you don't see that kind of ass worship everyday.

Use Pax Bolt to gain an extra 30% strength for your abilities on headshot kill before dropping a mote. Pax Bolt is a arcane for your KITGUN.

[Growing Power] gives you an extra 25% strength, but [Corrosive Projection] is superior in nearly every single case. At 389% strength with Pax Bolt, an extra 25% (390% strength) isn't going to make the biggest difference with diminishing returns. Even without Pax Bolt, 359% strength is already excellent. Sacrificing [Corrosive Projection] to strip L200+ enemy armor is a very bad idea depending on your team setup. But if you dont need CP, then you can run [Growing Power] AND Pax Bolt and [Reach] the 414% breakpoint.

Your 335% default strength will give your team a huge boost in basically everything. Use your stun motes wisely, this build does not [Sacrifice] range so you can block chokes and provide some defensive cover with it.

For Arbitrations and long runs, you can use [Adaptation] (rank 8 or less) if you want extra survivability. However in a team, they will be protecting you and killing everything with your huge buffs. Its not required and you may need to sacrifice a mod.

FLEX SLOTS

Augur Secrets -> Augur Reach; Reach provides extra 30% stun range and buff range at the expense of 8% total power loss

Augur Secrets -> Adaptation; so you can take advantage of your health pool even more.

Arcane Energize -> Arcane Grace; If you want even more healing...at the cost of granting your team tons of energy. Not recommended but listed here as an option.