Ive played both a WHM and a WAR to 50 on ps3/ps4 and havent had an issue with using more than 2 crossbars.
Now that i picked up SCH i find myself needing a third. Can someone tell me or show me how they have their cross bars set up to manage spells, pets, and buffs. Its very hard for me to manage my pet and myself. especially if i try to rouse, fey illuminate, wispering dawn.