Every one to their own, but i think catch can is a good idea, crankcase gasses and rocker gasses are hot burnt air with a lot of water/oil vapor in it, standard set up means these gasses are fed into the turbo inlet pipe to keep the emission people happy, catch can or cans will take the sludge and hot gas out of your inlet, its a no brainer as far as im concerened, you have 2 rocker outlets and a crank outlet, so fit a 3 port, not necessarily, they can be expensive so ive used 2 x 2 ports, one for rocker covers and one for the crank, much cheaper and more options for fitting space, vented to atmosphere, my inlet and IC has remained spotless since fitment, empty cans as needed, amazing the gunk that builds up, just my opinion.
Eric.