Raggs and Simon are each 4th level, Amaya is still 1st, and Iono is still 2nd. Ring is 1st, also. so Amaya needs to be advanced 3 levels to 4th, Iono needs to advance 2 levels to 4th, and Ring needs to advance 1 level to 2nd. This can be done immediately, before your journey to Badwall.
THAC0 is a 2E critter. This is 1E.its the THAC0, leif. nothing else. You had chided me earlier for using osric instead of 1st ed books - nothing about keeping the thaac0 out.
Just his Level Number, I guess.Strange!! I was sure I updated him several days after you told us to upgrade to level 4.
EDIT - I updated the HP and the spells. Wizards update their saving throws on level 6. I do not recall that I need to update anything else beside the above.