Rage skills lvlup easy to fix :
game folder/sessions/addon/ses.kfs/arena.txt , there is string of numbers
exptable=30,60,100... that is exp needed to lvlup rage skills. It goes up to 70000 at 60lvl. For more lvl`s just add numbers after last 70K, but remember that in impossible there is x1,3 for rage so you need 30% more exp then is listed in arena.txt file like you saw your rage caped out on 91000 which is 70000x1,3.
So if you for expl add 10 more lvls and max is on 85000, then in impossible game you`ll need actually 85000x1,3=110500 exp for that 80lvl rage in game.
Add as much lvl`s you want, save file, close archive and return to game.
Thing i`m not 100% sure is do you need to start new game, or it will accept new lvls in already started
Hope this helped you at all.
@Nevar
But in the Legend, each spirit had 4 skills, so it was 16 rage skills total and each of those skills had it own rest. So you could use weaker skill every battle turn, or use 1 strong skill and w8 3-4 turns to cooldown and there was strategy in planing which rage ksill to use when.
AP and WotN you have 9, so if you lvlup each Valk only after using her specific rage skill they would have horrible exp gain due to each skill rest period, and when it get to be used again enemy army is much smaller and exp will be insignificant for every skill use after first 5-6 battle turns.