It's all speculation this far. Although economically wise, I'd tend to agree with Mal that the ideal would be to get those guys already in the lower 80's some additional points, since particularly the last 7 or 8 points to GM are hell, we'll have to see just how efficient and how "far" it will take us.
Maybe it does get stuck at 86, maybe it's better to get the extra points early on (from 55 to 86). I think it will depend on the number of targets, and I would agree, a controlled number, probably under 10 would be ideal. This does not mean we have to limit the number of participants, we could just hold two sessions at diferent venues (if someone could provide an additional place to hold them, ehem-Mal-ehem) or diferent times.
I'd be more interested in concentrating on having casters with GM Mag + GM Eval in order to ensure max dmg, and start seeing what the appropriate number of targets is. We could start with 10, if we see it's not working, the highest/lowest resist targets (depending on what we decide) can start peeling off one at a time.
Also, something to keep in mind, what exactly do we want out of the session? A bunch of players with 85+ resist, or a few with a little over 90 (since even if we go to 5 targets, I don't think we'll get far above 93 or so)? Under this reasoning I'd be more inclined to have more ppl at 85+, and here's why:
Using the Resist Calculator found
here, an e-bolt at:
GM magery + GM Eval vs. 55 Resist = Chance to resist 11%; Max dmg 46; Avg dmg 26; Min dmg 5.
GM magery + GM Eval vs. 86 Resist = Chance to resist 40%; Max dmg 43; Avg dmg 24; Min dmg 5.
GM magery + GM Eval vs. 93 Resist = Chance to resist 47%; Max dmg 43; Avg dmg 24; Min dmg 5.
GM magery + GM Eval vs. 100 Resist = Chance to resist 54%; Max dmg 42; Avg dmg 24; Min dmg 5.
Diference between 86 and 93 resist is a whooping 7% chance or resisting the spell. Is that worth 10k MS regs?
Seeing that last session all 10 surviving targets tended to get stuck at 86, and using the same calculator, meteor swarm for 1 target at:
GM magery + GM Eval vs. 55 Resist = Chance to resist 11%; Max dmg 53; Avg dmg 30; Min dmg 6.
GM magery + GM Eval vs. 86 Resist = Chance to resist 35%; Max dmg 50; Avg dmg 28; Min dmg 6.
GM magery + GM Eval vs. 93 Resist = Chance to resist 42%; Max dmg 50; Avg dmg 28; Min dmg 6.
Therefore, I don't know how much more you will gain above 86 since damage is basically the same.
Only one way to find out...show up on friday, and let's see where we go from there.