2. For the new calculation i just assume a 20% gap between min and maxhit and just approximate it with 0,9*maxdamage
3. Yeah you would have to do it for most of the abilities (and speccs...), but i doubt it would change much, as probably most of the abilities scale the same way. Maybe i'll do a finisher later as they could have vastly different ap scaling.
4. I think you only have to consider the raidbuffs which affects critchance and stats directly as the rest of the buffs should affect every ability and every average damage the same way.
So the calculation would become:
So its still valid to assume critcap is optimal. But yeah the difference between being at the critcap and not is not nearly as large as expected.