ARCHON SHARDS:

2 Normal yellow shards for casting speed
1 Normal blue for health to hit full bellicose
1 Tauforged purple for [Equilibrium]
1 Tauforged red for ability strength
Red shard can be changed for anything, it isn't mandatory, I just like to have it. The blue can be tauforged for a little extra health, but you can get full bellicose without it.

For Exilus slot, it's literally whatever you want. I chose [Power Drift] bc of more ability strength with mini [Sure Footed], but if you want proper [Sure Footed] go for it. [Speed Drift] and [Cunning Drift] are also good picks if you want to be faster.

[Primed Flow] isn't mandatory either, I just find it nice having an insane amount of energy. Normal [Flow] gives you 500 energy, which is more than enough, but if you have [Primed Flow], then I'd absolutely put it on.

The Arcanes can be changed; Arcane Bellicose is good because of how much health [Grendel] has, and Molt Augmented is good for the extra strength. Another good pick is Arcane Guardian for the armor.

DISCLAIMER:
This is basically the same build as WarframeFlo's YouTube video. I suggest checking that out for the full build explanation. I just wanted to put this here for anyone that doesn’t watch build videos or hasn’t seen his video.