Umbral [Nidus]

1min long 96% damage transference to enemy mob (or 48% boost to an ally)
19m grab radius of larva
40s Ravenous

Duration is not wanted to allow 2+1 combination to quickly build stacks and enable quicker cc of mobs as additional enemies appear without getting overwhelmed.

Further range is not wanted because Larva will not pull through walls and it's out of bounds cc is not reliable.

Hunter Adrenaline and Virulence will provide all the energy required to fuel the 2+1 combination.
Gladiator Resolve is flex slot

Use 3 on the Larva to instantly activate damage reduction giving you time to build the stacks.

Arcanes to preference

-Dodo