Do not waste your time on spamming #1 ability. Just focus on tough targets.
All others will be killed by the cat.
Want to hold the wave of mobs? Stop 'em by "Ensnare" and kill 'em at once by one sweep.
Did you seen "Resident Evil" movie, that part with laser wall? Feel the same with your "Strangledome" ability.
Select Heal command and you get ~150HP/s from cat.
Also, thanks to the "Hunters recovery", you can be healed by the cat even with Attack posture.
[Venari] build
About Umbra mods - If you max them, then you can change "Umbra Fiber" on "Argur Secrets" or "[Steel Fiber]" (need additional form in case of Fiber)