Tower and Valkyrie Unkillable with 43 Champ
Note: Calculator currently does not show Valkyrie's passive TM gain.
240 - Tower, double turn going last after Stun
226 - DPS, double turn going first after Stun
171 - Valkyrie, goes last most turns, except after the stun (Void only).
Full Auto, but can be finessed when bringing in Sandlashed Survivor to up damage. Sepulcher Sentinel is another excellent addition in the 225 slot to make it affinity friendly.
Key is using Valkyrie's shield to soak the stun. Having increase def up before she uses it is KEY.
On affinity Clan Boss, if you do not have Block Buffs up, Valkyrie will slowly move up in the turn order until she is going first after the AOEs. If you bring Sepulcher Sentinel, you will eventually want to delay Valkyrie's shield cast by a turn to benefit from the DEF up.
The ranges of these speeds is much wider than shown, so as always CHECK IN THE CALCULATOR. Enjoy!