Why wouldn't you consider using heavy thrust with blood for blood and other buffs...? Have you seen the huge dif it makes..? I used heavy thrust and blood for blood and the crit raises over 50-150 more dmg on one weapon skill than without heavy thruat. That is way more than your calculation. All I know is I've tried running wonderers palace with and without heavy thrust and it was about 10-15mins faster over all to clear. Sure there are many variables... but trust me stack your heavy thrust with all bufss and then use the combo and watch how much dmg u do... it even escalates even more with a limit break