Im completely starved on brimstone/crystal/granite, i sometimes dump excess of power to brim/crys, but thats just not doing it - +25% runes help a bit ofc, but considering 3k ess swap cost you should think 3 times before changing runes.
but we are talking now getting 100-150 ish per battle, maybe 2x that in itherian.
i think the answer could be fight higher monsters, but i guess it will be a long long way till realm 250+ ? or ith 150+ of starvation before battles will start to pay for breeding
so maybe im overlooking some stuff?