I really am all for being more vulnerable to light damage while in PM form.....but it's crazy as it stands now, 2x-4x damage taken is simply too much.
Make it 1x-2x........seriously, player character PM's are the equivalent of red named dungeon bosses in power....maybe not mega HP-wise, but we shouldn't be equivalent to the trash.......you can't one shot those bosses unless you are doing the content way under your level....why is it we should suffer that fate.
I know I can just turn off form for situations like this and use my hireling.....but the damage taken seems a bit excessive IMO.
I know use tactics, and I do, but when you walk into a room with 2-3 casters spamming light rays...you don't even have time to think....much less react.