Look at KFCrispy’s S rank run on the suikosource youtube channel…
He got 4416 Exp. There are 11 enemies, so you need 5500 Exp for S rank in that single criteria, and at least 3850 for A rank (he got that). But if we take the 2 reinforcements into calculation, he would have only scored B rank, so he couldn’t have gotten overall S rank. So it seems reinforcements don’t count.
I counted like 50-52 turns (inclusive of enemies!), so at least A rank in that criteria.
-> S + S + S + A + A = S as final result
There must not be more than 65 turns in that level!
You need at least 3850 Exp! (KFCrispy’s cohort attack on those 2 skeletons was crucial, the first unite attack was not so important)
…provided you S rank the other 3 criteria. Be patient, good luck!
"Within the four seas, all men are brothers" Shuihu Zhuan