I was where you were on distance last year unless I used a forehand shot. Now, I'm getting 300 consistently with my backhand and going bigger occasionally. A couple of things have helped me. First of all, snap the towel, literally. Get a wet towel and practice until you get it snapping good. That is the type of snap you want as you release the disc. Next, nose flat! The leading edge of my disc was up and this slowed down my disc and sent it too high. If I remember to push down slightly with my thumb (my thumb is near the edge of the rim), I can get my disc to parallel the ground better and the disc lifts due to its airfoil shape. For power, I use the mental image that I am throwing my hand at the target instead of the disc, it sounds weird, but it works for me. My longest disc at present is an R-Pro Boss, but its a tricky disc, if I don't release it with enough hyzer, it will turn over too hard and crash into the ground. A better choice imho is a Discraft Impact. It holds a straight line very well when released with hyzer and I can throw it as long as my other drivers (except that Boss). Oh yeah, don't forget to practice driving with your putters. It can be frusterating sometimes, but a putter won't go anywhere unless your form is decent. Hope that helps.
Some good advice here already. I'll add that if you're serious about improving, focus one one "point" at a time til it's muscle memory. I'm no pro, but I suggest:
pulling into the armpit
though it seems to me the last ones are most important, without proper grip and pulling into the body, they don't do much good. Also, there does seem to be an equation for putter d = ____ distance with mid/fairway/driver, but it seems that distance has more to do with high apex while nose down then the disc itself.
Oh, I would suggest a cyclone. It's versitile, nose angle forgiving, easier to get up to speed, and capable of distance well over what you're quoting now. I feel 100% confident throwing it on hole 2 @ farm at founders(water hole)
If you prefer innova, gazelle or eagle