It’s actually an easy win if they go first! An R9 enemy Piett, let’s you control turn order because the AI is fairly predictable.
You want your XBlood faster than your RCrest —> this is essential if you want to avoid RNG.
—> This roughly equates to Cad Bane being 1 relic level higher than BAM + having 2 more 6E.mods than BAM e.g. R7 Cad Bane with full 6E vs R6 BAM with x4 6E x2 5A.
—> You need Ebon Hawk.
Starting lineup = HT, XB, RC
Usually they Nuke your RCrest, this makes your HT gain TM and move next. Target their HT and taunt. Next heal your RCrest. Your next move is to use your XBlood to call an assist from your RCrest on their XBlood. This will mark it. Next —> your RCrest calls XBlood to kill their XBlood.
First reinforcement = Ebon Hawk.
It should be an easy win from this point!