I was thinking of going support (no clue if my own summons can be buffed) but I'm also undead (Fane) so maybe I'll dip in Geo for the poison and then water magic (?) for the heals and stuff. Is constitution worth putting points into? Memory seems appealing for a summoner/support but I'm unsure about the secondary stat.
Well Con is a stat dump, if you don't need the other stats you could get Con. Memory is nice until you have enough slots, past that it's useless and since you get some slots every other level or so, you don't want to dump too many points into it either. Wits is nice to detect secrets/traps and have more initiative, don't need to increase to the max either. Probably something like +1wits/+1con, +1wits/+1memory alternating, with int thrown in every now and then and stop memory once you have say 15-20 or so slots, maybe less not sure.
Also one advantage of having 1/2 in other magic schools is you can make incarnate element change spellbooks by crafting them(or can find them I guess too). The 1pt do normal element changes like if you summoned the incarnate on that surface(good if you want to change element mid fight without resummoning), but when you have 2/2 in summoning+magic school books, they change them into improved version which gives them additional skills.
Oh and since you posted again, the reason you go these meh stats is cause int doesn't do anything for summons. They only scale on summoning and your level, so summoners don't need any damage stats, so you can go for whatever else instead. For an actual caster you'd want to get as much int as possible instead but not for summoners.
In Act2.
My game doesn't appear to be autosaving. Last autosave was 1hr10 mins ago, does anyone have any ideas on what might be wrong? Feel like I'm going to get screwed over here if I don't fix it.
Also having problems with cloud saves, I fired up the game on my laptop and it only had the very first 2 saves ever made despite playing for hours after this point.
Autosaves are only like checkpoint saves, when you enter certain areas it'll autosave there, but it doesn't autosave based on time spent. Use quicksaves, increase the amount to 25 of them so you can go back a fair amount of time even if you mess up. And do normal saves every 1-2hours or so, that's what I do at least. As for cloud saving, might be steam issues, I never rely on it. You have all your saves in your documents folder so you can just copy that.