They're all good choices but, as you're well aware, without context impossible to answer.

If you aren't already downing UNM though, you really should focus your efforts on that. Geomancer can help quite a lot there.

Husk and Uugo are very good for Hydra, so if you're already getting top UNM chest, I'd probably vote for one of those two.

I am just doing NM at this point so I will go for Geomancer. Question then, should I switch out Kav with Artak to max burns? Kav is a awesome for me and dumps out a ton of damage but he can also quickly steal all of the debuff slots with Vizier if I am unlucky. I suppose I can play around with it to see where my damage lands. 

You really need to do some more reading on how CB teams work. Kalvalax is hugely wasteful to run on the same team as Vizier.

My suggestion is to drop Vizier from the team, and run Geomancer with Kalvalax. That'll keep the debuff bar pretty much full. The other three spots should be people to get your rotations to work cleanly.

Will do. 

Please feel free to post your full roster too, and perhaps the awesome folks can come up with a solid UNM strat suggestion or two.

if it was me personally id do geomancer then husk, then uugo.

There you go in all its glory. 

I welcome any advice on a UNM team. 

you have some really nice champions to be honest.

orn - this guy is like a lesser version of teodor, he is capeable of running floor 25 dragon solo with 4 chickens flawless with an average time of 3-4 mins per run (he does require love of masteries and books and good regen set etc)

occult brawler - this guy may surprise you but he will generate an average of 8-15m of dmg for you on cb alone, depening on how long you can survive etc, hes also insanely easy to keep alive at cb and i use him in some of my rotiations, he doesnt require a single book either, but masteries are helpful. EDIT : scrap this just saw you have kavalax lol

 fayne can also be really good for cb but im pretty sure you need unkillable team to make her work.

also dont hesitate to get geo to 60. ur 100% going to be needing him.