I note that Blatty insists that dropping stacks is death...but amusingly is also not thrilled with scorch weaving. He thinks it is possible to keep up the stack without using scorch and mostly has been able to do so during the streams I saw on Sunday and Monday. He never lets it drop if he can possibly avoid it.
He prefers fishing procs with AB if it comes down to that and seems to be saving his gem for when he is forced to do this. He also thinks that loose mana is a bad glyph, and prefers to get it all up front.
He had a fairly long discussion about this on Monday after clearing Will of the Emps. (He was able to keep up the stack throughout that fight until he had to eat a spark.)
understand that his gear will be much better than the broad majority of mages playing the game. Also, something to consider is the fact that he raids 25man and all buffs will present giving him a further edge over the majority of players.
The game will be balanced for PvE around this type of setting and not balanced around what undergeared players in 10man w/o full class buffs are able to do.
What someone considered one of the best is capable of doing is a great goal to shoot for
but might not always be a realistic goal. Take what he does with a grain of salt and be realistic with your own capabilities and raid settings.
Mana management being the major issue with keeping 6stacks means that players won't be able to blindly "keep a 6stack and never dump it".
Something else to consider. I could be misquoting when I say this but I'm pretty sure it was stated by either a Blue or Green that the design intent for Arcane was not that they be able to keep a 6stack up indefinitely. If mages are able to do that and it is in fact unintended you could be nerfed. Keep in mind this was before the resent buffs and the design intent may have changed. I would be wary of doing things unintended w/o considering how you might fix it if/when and issue is sighted by blues. Wish you all well in playing arcane and hope it goes as well as you all hope, sincerely.