It is possible to hit lvl 3 with just picking up shadow and astarion.
But there are a cupple of things I need to do and some skill checks and some luck.
First to succeed all checks with the devouler and kill it.
Kill from the stairs the two imps before they get destroyed by the dragon or the cultists.
Free shadow and kill everyone on the way.
Then kill with acid the newborn mindflayer.
And finally killing e eryone else( all cambions on the way out I clouding the mindflayer). I usly ending with 65-90 XP missing but i never checked the exact number. Around Astarion or after crushing the mindflayer's head I hit lvl3.
