I got this...

Rolling an 11 on a Phantom Roll will give you the best possible buff (as it does now) but will also not take a slot on your "2 buff list".

I.E. I have Chaos Roll (1 buff), I roll Evoker's Roll and hit 11.... when the Phantom roll timer is up I can roll Hunter's Roll for a total of 3 buffs active at one time.

If I roll an 11 on Hunter's Roll.... well... I can now roll a 4th

it's not over powered because Snake Eye is the only control you have over hitting 11, and it's on a 5 minute min. timer anyways... We don't hit 11 enough for it to become an issue, and it will REALLY play on our luck, which is what SE always wanted anyways.