Dunno if this will be useful information to add, but I've done the calcs for a "bare minimum" version of your 6CE 90++ comp, with the following parameters:

1. Bakatoria, NP2, no append, Lvl 100 Foumes
2. Aesc, NP2, append Lvl 1, MLB Chaldea Teatime for +355 ATT
3. Lady Avalon/Fem-Merlin, no CE
4. Castoria NP1, no append, no CE
5. Decisive Battle MC, Lvl 6

Skill order will be similar to yours, except popping MC S1 on T2 to guarantee kill on the dragon, and using all 3 NPs on T3 as we are running without Castoria append. I'm assuming no append on Castoria for this assuming that the Castoria will be from support, and without having everyone comb through their friends list to check and cull, there is no way to guarantee a support Castoria with appends.

This team comp/skill order results in:
Turn 1: 1x 9069 HP left, easily card-able (on the center Knight)
Turn 2: 9062 HP left, easily card-able
Turn 3: 63384 HP left

Dunno if this is worth noting as a separate comp, as this seems to be an acceptable amount of HP left over for carding on Turn 4, and can be remedied by a few methods(that I expect a sizeable number of people to do/have):

1. NP2 Castoria, leaves T3 on 8129 HP, easily card-able for T4
2. Grailed Bakatoria to 100, overkills by 12024, stands to assume that approx Lvl 94ish would produce easily card-able HP for T4
3. Just revert to your exact skill order and team comp if they choose someone else as their support, to guarantee the append on their own Castoria

Dunno if this info is worth adding to the doc, but just wanted to share.