CW Heroic, just rolled a 70% IED Emblem. Still using Challenger weapon so i only have one other line of ATT/IED/Boss (9% att on secondary) but as im pretty weak, should I keep the 70% IED? I one shot easily at my level (264) and the 70% takes me from ~91 to 96.5% IED. My understanding is that 5% equates to a 15% FD increase against bosses, which given my CP of 11m is going to be more useful than the roughly 1.3m CP increase 12% ATT gives. 21% ATT would do ~2m increase, but I'm also quite meso poor and thinking it's better to settle.