I have been tanking using ps4 cross hot bar... Even remote play on the Vita with no issues. I suggest enabling the extended hot bar. This enables you to have another 8 skills by holding one of the triggers and the holding the second. You can also have R2->L2 and L2->R2 bring up different bars for 16 more. For ease of use you can have them pull up the same bar as well. Using this I have never run out of space on WHM or PLD (only 37 atm).
