Don't Discard the Lesser Monsters (skills and ability-wise)
Why? Theres a reason why theres 150++ monsters in the game, if you limit all the godlike things to the epics and legendaries whats the sense of getting lesser monsters than the mentioned two if you will always be disadvantaged by their greatness? You will definitely always see similar and the same monsters each and every time during PvP and Ladder Tourney's.
I liked this game because i saw that there is depth and gameplay mechanics involved. Its not just simply putting high damage skills and high rate attributes and stats to win and be the best, there is what you call tactics; from the status buffs to the monster abilities. Don't ruin it just for the sake of easy pay-money or whatever your plan is. Think of the long term implication of people wanting to play your game because it is balanced and cool; and they would even pay because its so fun to do so for the sake of the playing the game itself. You will further sustain your business this way.
I believe you guys have a plan for this, limiting the best stuff for the better monsters; but also better be sure to let the players have a second thought why they should choose a common, uncommon, rare over the epics and even legendaries. Let them have a reason why they should mix up their line up by using almost all monsters in the game. Do this and i think you will have a completely awesome game.
I am very optimistic that you HAYPI PEOPLE will be able to read this and if i am fortunate even get a reply from you. Cheers!