+90 vets and +100 experts each would about triple your gunner's actual ability. If you're
patient you can get all the experts you'd need from AAing (and some more free vet
conversions). Or you can buy them if you have more money than time.

I classed both of them as acc > rel. One has 213, 151, 10. While the other has 221,
143, 10. Will B/V/E make like alot of difference?

What did you class them, first of all? Even classed Accuracy twice won't help you much if
they aren't BVE.

It would help to know how many vets and experts they have right now. If you have
mostly rookies, then it's generally a sound decision to apply at least a bit of money onto
your gunners. Otherwise, at that level, there's not much that you can do except grind it
out.