theres hundreds of things you can do to get what you want out of your ics, mainly i would say your gears are good. i'v used ics gears in the past and there pretty danm good. so your gears are probably good to go for what you want.
I would sudjest an m120 spring, a ball bearing spring guide, ball bearing piston head in policarbonate, to keep the shock from the piston hitting forward, down. a new hopup bucking in a medium % rating like promethious, or guarder 50% or closest to that.
i'd also sudjest a .03 madbull tightbore maby extended thru a mock barrel extenshion that looks like a suppressor. .01 tight bores are a little to tight for az i think, alot of dust. madbull is by far the best of the affordable barrels in my opinion. keep it clean and ull be happy with it.
then when you get tho's done you could shim your hop up arms to reduce side to side movement, aluminum foil does the trick just fold it a few layers thick. and put it along the sides of the hopup arm so it doesnt move side to side.
youtube is your best friend bro. dont forget that you can find everything on there.