Mail armor is worst in terms of transmog, i’m mixing different items in a hope it won’t be ugly, or trying to farm heritage, tier sets which are good. You can try Eagletalon Battlegear (Normal Lookalike)
For any kind of Elf, mog is basically non-existant as a Hunter
The Night elves are kinda lucky (tho not that much) because they have the Darkshore Kaldorei archer set… but thats it
I find season one and two hunter set amazing, same with the t3 hunter set which i use for my hunter.
Some mix with heart of fear set and others are pretty good aswell, think the key is to mix sets or random green items ^^
If you are looking for a full set (minus maybe the boots coz they are so chunky) then I would recommend the Nighthold set too. It’s perfect for a Night Elf. The pvp one is particularly nice colour-wise.
If you collect a lot of transmogs, it certainly becomes easier (check out the uncollected tab in the transmogs catalogue in-game - definitely helped me target specific raids for gear).
Sadly, a lot of the earlier stuff is very basic and then it seems to morph into very Shaman-like gear and now there’s tentacles and eyes on all the gear for the current content. Hopefully in the new expansion, there’s a bit more variety.