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This post shows pretty conclusively that you will be forced into HL11/9 with tons of cancelling if you still want to have your gear for HL... but since you're cancelling illumination isn't as good, hence crit isnt' as good, hence you're better off gearing yourself for FoL. So sadly, IMO at least, it is true that we have be forced into the FoL spam route, I have already begun converting my gear own gear accordingly.
i removed what had before since i was misunderstanding you.
at first, i was reading your post as if you viewed crit/illumination as a form of 'mana regen', as if mindlessly spamming HL results in mana regen. I didn't understand how crit/illumination was best when in a spam environment.
after thinking about it more, i see how crit/illumination are 'at their best' when in a spamming environment relative to mp5 or +healing. When one starts to cancel heals, mp5 becomes better for regen. When one starts to use FoL, +healing is all that matters, since FoL is already efficient (no massive need for regen). I guess, i'm just saying 2 things. 1. crit/illumination is still very good as a 'scaling reduction in mana cost', regardless of spam casting. 2. spam casting might be overrated in that it tends to result in more overhealing.
i guess i've never thought the mindless continuous spamming of HL was that great since those that did it tend to have significantly higher overhealing percentages. They went out of their way to cast, thinking that they 'regen mana' when casting, but in reality they still loose mana (even with a 100% crit rate), and end up waisting more mana than anyone else. I'm just not convinced that HL spamming was a effective as people thought considering the significantly higher overhealing.