what not to miss in pre searing ascalon

what is there not to miss? Also is there only 3 elementalist skill trainers?
Are skill points unlimited or after you hit level 20 u cant get anymore skill points

I don't think they're unlimited, but you do keep getting skill points after 20 (supposedly).

I bet there's a 4th Elementalist Trainer in pre-searing Ascalon (water), but no one's reported it.

My finding, and people can correct me if I am wrong, but there seems to be two ways to get skills. Quest them or buy them with skill points. Now before I left Ascalon pre-searing, I had all my R/E skill/spells except flare. I probably won't use flare so that was no loss to me. So when I went to Ascalon post sear, all that showed on the skill merchant was flare. I still have all my skill points (8 at the time). I had never spent anything. So I have to assume if you can find the quests you can have all the skills available.

I even have friends that had to blow a skill point on the ressuraction signet post-sear since they never got it pre.

I hope this helps.

and again if I am wrong I am interested in knowing.