I find it easy to dismiss problems that are stated in terms of playability, but not measured in any way.
No slight personally, to the original poster (or anyone else for that matter), but the "My strings buzz" issue really needs more than that to make any sort of reasonable answer worthwhile.
If someone says they did a "setup" and cannot say what the 12th fret string elevation is, or how they set the string elevation at the nut, or what the relief is set to (and at what fret), then there's really not much of a set up at all is there?
To do a setup, totally "by feel" may be ok if you already know the "feel" of the neck. But necks, frets, fretboards all feel differently. Doing that first setup - and later tweaks - "measured by the book" really puts everything as it ought to be. Then your know its right. Then your hand has some learning to do, if it doesn't feel right, or... if any further work is needed (such as fret ends).
There are mathematical limits to string elevation, with some give or take for playing style. Even more so, those limits will quickly become evident when you bend strings in the upper frets, beyond fret 12, where the limits show up as "fretting out" on bends.
Measuring the distance from fret crown to fretboard sometimes reveals un-useful information. The real issue is the fret crowns in relation to each other. Assuming a well made fretboard, the crown height should be pretty uniform though. On a refret or older neck, where wood has had a chance to age, shrink, expand,...change.... then the gauge to measure how tall the frets are is only good for saying "we need replacement frets about this tall, or just a little taller" to make the neck feel the same as it did before (assuming the width is correct)
I read some posts ago, that Gibson uses .036 tall wire. They "used to" use wire about that tall on electrics, but stopped that in the late 70's or early 80's (you can look it up at the Les Paul Forum). The fretless-wonder LP Customs had that wire taken down to as low as .025, close to the limit of having frets work at all. Gibson had a very shallow curve to the crown as well back then, almost flat. These days, Gibson uses wire about .047-.049 tall. Thats a huge difference. They also went from wide wire, to a more narrow wire at the same time. I remember what we used to call "SG" frets, the low-wide frets that were a little taller than the LP Custom frets. They were nice to play on, but a @#$@# to bend on with heavier strings. I used to like 'em. Now I prefer .010's or .011's on taller frets. Just feels better to me. Since Fender and Gibby and most of the others have started using taller frets, it must be there are a lot of folks who feel the same way as I do.
So much for rambling... hope the OP got his problem solved.