Theres actual more oddities with those values.
3200/1.4=2286 Estimated atk value
3200*1.5=4800 5600-4800=800 800/1.4= 571 estimated critical attack value
Normal Critical Attack without lunge
(2286*1.5)+571 (1.4)= 5600
Geras Critical Attack without lunge
(22861.5)+571 * (1.5) * (1.4) = 8400 (Hmmm…)
Critical attack Difference without lunge
2800
Normal Spear with lunge
(2286*1.5)+571 * (1.5) * (1.4) = 8400 (The provided value is 8,200 for some reason?)
Critical Geras spear with lunge
(2286*1.5)+571 * (2) * (1.4) = 11200
Your Hypothesis with critical hits
((22861.5)+571) * (1 +0.5) * (1.4) + (1044+1300) * (0+0.5) = 9572
or ((22861.5)+571) * (1 +0.5) * (1.4) + ((2286*1.5)+571) * (0+0.5) = 10400
Doesn’t really work with crits in either scenario. Should be exact given how I derived the values.
I am just gonna go with these values aren’t conclusive enough to say anything. Would actually have to have values from character with gear meant specfically to test something like this. For example minus max attack gems on a geras with nothing else on. Against mobs with know defenses, and not being weak or resistant to piercing.