If you are going to summon this weekend. I suggest to wait and see what you will get in this summoning event. 

Aside from Psylar and an aoe provoke champion, you do not need anything more to finish doom tower. You may need better artifacts at this point. I suggest to use Elenaril than Drex. 

I cant give much advise for UNM as I am only using 2 Maneater unkillable. 

For faster dungeon runs, you may need specific champions for this like Seer. You may also like to search for poison comp with Elenaril and Gurptuk. Her 3rd skill can one shot dungeon boss with right comp. I dont have Gurptuk and Elenaril so I am not certain on the comp. 

For tag team, I think you are lacking strong attack champions to pair with your Arbiter like Trunda, Skullcrown, or even a Zargala. I suggest to 6 star these right away once you summon them. 

But if you want to 6 star someone in the upcoming champion training event and you still dont have an idea who to rank up. I suggest to look at your FW, look at the faction that you can finish next. And 6 star a champion that you need. 

Thx @joinme 

I think elenaril meets my criteria for being useful without books, at least for doom tower. See if my shard luck helps me at all. Definitely need to up the gear everywhere. 

Jotun

Grunch Killjoy

Nazana

sikara

Husk

Alure (dupe)

Lordly Legion (lol, chicken)

...and one lego

.... Grohak the Bloodied (dupe of my first lego I got after 5+ months lol)

Anyone use Husk?  Seems like would be really good like a Royal Guard, no?

A clan mate told me his multipliers are low.