Just did a damage check on winmillion in tier 2 (landing the slash of the charge attack is incredibly difficult, from experience)
Anyways, tried following the standard on which damage numbers we put on the wiki, but it did more damage on the first depth of each strata than the second with some attacks, and less with others. Kinda weird. No damage bonuses on either of those floors both times. Recorded damage table follows (Forgive how terrible it looks)
S3 ____________ D9 ____ D10 ___ D11 ___ D12
Hit 1/2 _______ 48 ____ 46 ____ 50 ____ 46