I use 2.5 bars.

1st bar - My defiance set up with a macro'd deliverance that swaps my to Bar 3
3rd bar - My deliverance set up with a macro's defiance to that swaps my to Bar 1
2nd bar - My bar two has all of my buff actions on the right trigger and I've turned on the option to hold both triggers and pull up an action bar. I set it up so that both double trigger configurations go to Bar 2 right side effectively giving me 8 additional buttons which I share between my tank and dps bars.

I hope that makes