i have done sth that have lvl system, skills like summoning bots (ex rambo - have bow) that gives you exp...
and i am wrting a tibia mod for soldat - damage you do don't depend of level but how much you hitted sb, have runes, cash, premium account, login, save. i'm going to do creating acc, using some weapons carried in bp, mlvl, some spells like in tibia: exura, utani hur (looking for another way than AddSpeed made by Avarax - thanks for that nice script), maybe some runes: sd,uh - i have, i'll do fb,gfb, maybe sth like summoning orc itd, gonna do orc raid, goblin raid etc.
exp system is easy, didn't undersood decent rewards - like berserker bonus spawning for you??