What is the Best Tattoo Removal Laser for Lightening Green and Blue Colored Ink?

I am undergoing laser tattoo removal for a large, bright, multi-colored tattoo. I've been for a few sessions, & am seeing decent results on the pinks, reds, oranges, yellows, blacks, but not much of a difference at all on the greens & blues. My laser specialist is using a Cynosure Affinity QS , & has told me the green, especially, will be difficult to fade. Is there is another laser that might work better on this color? I'm thinking of switching to another laser tech for this color only.