My toons are reaching a level where critical hits are starting to matter a little more. Can someone help me understand the math behind this? How are critical hits rolled and 'confirmed'? What stacks and what doesn't?
How do items like 'keen' and 'seeker' affect this?
How do enhancements like 'fighter critical accuracy' work?
What about feats like 'power critical' and 'improved critical'?
Finally, is it worth investing in critical hits and, if so, what is the best wat to do it?