Additional data on stat testing, STR, ATTK, Base Damage

[carraway]

So, when do the diminishing returns kick in for STR on certain level mobs, because the 2 Lancers that I do Ifrit with do less damage than me overall & I stack attack. And after getting Harpoon my crits go over 1000 vs him so I'm curious when stacking str becomes pointless, or rather how much one should bother stacking before it becomes wasteful.

Comparing other people's damage against your own on a fight like Ifrit (with its huge potential for variance) is a poor test to establish confidence. Instead, you should be modeling your tests after ones like the OP's.