Talk:Sigma & Octantis/@comment-2605:6000:1018:41F7:A119:FAC9:FD6B:1BAB-20180313225708/@comment-58.7.226.27-20180710173935

x2.5 mult would give a 143% chance to crit on S&O. To red crit, you would need more than 57% added crit chance. 4 stacks of 15% = 60% and 143 + 60 = 203% therefore a 3% chance to red crit with 4 stacks and x2.5 mult.

I didn't notice any change in damage numbers with the stacking buff.

The buff is only gained when hit with elemental damage or elemental dot. Sigma & Octanis likely uses the Ack & Brunt elemental obsorbtion and the Silva & Aegis +15% crit and status stacking buff. Not sure about the status though.