I vote BH, Ares, and WS best ways honestly. BH gives 15 EC per time done along with chance of blue/purple divines and 30 ST you can either use for your gear or sell it for ECs. Ares gives 50 EC, 1 ET, 12 Ancient Emblems, and a Universe Chest which has a chance of actually giving something good(? Idfk I always get useless stealth popping pots) and WS is nice if you have patience or it's x2
NS is okay if you're fine with being pked now and then, dropping those coins.