Im not keen on random one as it was very unlogical and i hate how many games revert to the classic fake computer "Dice Roll" in order to product a result.

You cant really not find an work-around exploit with something, with any system. Even old one we leve boosted, in random we just aoe healed, and now in this we just have 1 guy do the work. You cant ever-stop it without making it very central. "1 claim 1 mob, set EXP, massive penalties, require enmity, etc"