I say remove everything including giants in rhisis. Everything but the bangs be removed in SM. Kill off all things in darkon 2 exept carriers, reduce everything in darkon3 exept mushpoie(actually increase the mushpoies.) All flying monsters should be stripped of their wings or flying objects. As for flaris, i say take out all Aibats exept for the ones north of flaris it just a waste of space having them behind the bank. Everything after the burdebong should be removed, i hardly see anyone bother walking past lawolf's. mars mine should have its roof caved in, now that theres no more spikey naked snake thingies theres no ponit going in there.
The SM dungeon is such a long way away but then if you want ivillis weapons feel free, so maybe reduce the spawns in the sm dungeon but increase the ivillis weapons drop rate. The darkon mine should be stripped of everything but pinkies/blues.
Onto azria! remove all the princes/kings that aren't directly left of the bridge on the yetti side and left of the entry point theres no point having them there because there spread out and impossible to aoe more than 10 at once. reduce the cannibles that are spread out around the bottom-left part, increase the normal mammoth spawns because atm theres like a maximum of 15 and there spread out so far you can only get 5 at a time. i hardly see anyone at mutant yetti's so reduce yetti's ad mutant yetti's by alot, the mutant augu are going extinct so we need to boost them up a bit more.
finally coral island. I think most of the kraken exept the ones directly ahead of the spawn point should be removed, the captain tigars are pretty much useless unless you want 1-2% more exp per kill but tun alot more to get to them so it balances out, not sure if theres anything in coral exept kraken and tigars, never bothered to look so if there is anything else in there you might aswell kill them off
i might go fly around and make a list of everything that imo should be removed later on.