base mod already multiply = lvl10gm*10 = *2. only gm card/split arrow is base mod right now.
skill mod is final after that. no need to calculate for more confuse.
but if you want then.
ex base 1000 skill base 1000 crit dmg 1000 skill mod 300% attribute 100
red gem lvl10 = 580 average = 290 gm card lvl10*10 = *2
((((1000+1000+290) *2) *1.5)+1000) *3 *1 *1 *2 = 47220
yellow gem lvl10 = 870 gm card lvl10*10=*2
((((1000+1000) *2) *1.5)+1870) *3 *1 *1 *2 = 47220
it’s 47220 = 47220
same as i calculate with out base/skill modify thing.


for covering fire. Since, damage flying all around is more amusing to see.