Finally some1 figured out that 10 lvl for unit exp is to low
I added 15th lvl myself long ago, but i think that 20 lvl`s is a bit much since it`s hard to achieve, and enemy units will always have at least 1 more exp lvl then your army. But it`s personal choice.
Ice ball isnt problem cost, but lds/unit, first game i played in RSE mod i found 500 ice balls in first shop on Verona island and saw how op they are). For 3rd lvl unit it have sick dmg and spikes ability ,+90% freeze. If need to fix it rise lds requirements to 300 or something, cost 1000 should be enough (since gold for buying units rarely problem in this game, but lds to carry enough is).
Legendary phoenix resurrection is to much, 1400HP unit, and resurrect aoe for 1500 hp !? It`s strongest resurrecting ability in game, to much in my opinion. 900hp res is more then enough.
And what did you changed in items.txt file in your update, i cant find any changes ?
You should check 11th page, my 2nd post there, about HP% gain when units lvlup. It just seems unbalanced that low lvl units get absolute bonus which is 100% of their basic health, and high lvl units get same amount of HP which is 0,8% for black dragons for example. I set it so max hp bonus is 50% no matter what unit , all get same % depending of basic health. You give +1HP per unit lvlup, which is useless for 3/4/5 lvl unit, and even 2nd lvl unit would have some benefit from it only at max +8HP which they and achieve around 10-15th exp lvl. But again as i said it`s personal choice.