I’ll go with what’s currently levelled - you want to build for attacking teams rather than defence going forward…
Telluria is easily your best tank, so that’s easy.
Strong colour against the predicted stack always goes well, preferred as one of the flanks - you can get away with using two of them if need be and both Alice and Fenrir are great hero’s.
Kage is also a great hero but needs to be on flank - he’s awful on the wing.
(You need him firing early when he’ll hit enemies with over 50% health… So he needs to charge early - he’s a flank.)
Ranvir is very hit and miss on defence… but he’s fast and potentially flips a losing fight, so there’s an argument for him as a wing. It’s not ideal but it’s an option… At least he’s fast mana (which wings should be).
Evelyn is okay on defence but you don’t want to be running any more greens with a green tank so they’re out.
Grazul is okay on defence… Has to be flank to have any real impact… Generally you don’t want healers on wings, so would have to be on flank.
Right now I’d start with:
Ranvir - Alice - Telluria - Kage - Fenrir.
If running Ranvir he wants to be right flank to enhance any other specials firing in the same turn.
Alice works on flank or wing, ideally you want one of your flanks strong to the expected stack - you expect a red stack against Telluria, so a blue flank is always ideal.
Telly is your obvious tank.
Kage must be flank and since Ranvir wants to be left and Fenrir wants to be right, Alice must go left flank away from Fenrir so Kage goes right.
Fenrir right wing - he’s a finisher so wants to go right wing so that if anyone else fires same turn and puts Fenrir’s target to half hp he can deliver a finishing blow.
You want hero’s that will upgrade your attacking capabilities.
Sartana is another good dark sniper and runs well on the wing. Opens up defensive options and also great on attack!
Freya is great but needs several other minion hero’s to really come alive - preferably with more attack minded minions than Telluria gives you… You want Puss to build a truly spiteful minion beast team.
JF runs great as a flank to Telluria… But he’s also great as a counter to defence debuffs and his +crit works great in attacking stacks (eg: with Grazul, Wilbur, BT).