you can try lvling twinking .. twink with your xp on .. i am doing that at the moment in every bracket .. but most of the time i am in 10-19, i am using only mm hunters, all you need is greens (with max versa stat on them) for all slots, BOA trinkets, and get the parachute cloak and engin helm, max enchant all of them (pants need a LW to help you) .. anything that has versa should replace your BOA pieces .. you will 1 shot most players, and 2-3 shots players even when they have 1+k health, you should get ready your greens well in advance before you create a toon cos it is not easy to assemble a set, i get ready the gears at lvl10, lvl12-13, lvl15-16, and at lvl17 they are using both fang and slither sets (gotten before they reached lvl17), in my case, i get them a full set of lvl20 fang and slither set even before they reach lvl20, i will prepare each toon such that they enter the last 10-19 bg with very little xp and ding 20 soon after entering, change to full set of lvl20 gears and have a good time
how to slow down your xp gain, use Q Specific instead of queueing random, wsg gives the least xp gain, each flag cap is about 1 bar increment, if you meet some other lvling twinks they sometimes hold on to flag without capping, so you can farm the bg all you like till the last 10 seconds, after that you leave bg as a deserter
create a few toons at the same time, so when you get the 15 mins deserter penalty you can log into another toon to play .. lvl10-19 is the easiest to do this, i skip lvl20-29, during 20-29 i run dungeons (i think about 4 dungeons and you get over this bracket, with your full BOA and anniversary 15% will speed up even more), get the dungeon reward bag, dont open them, keep them, once you hit lvl30, gear slither and fang set again and open those dungeon rewards, then sync into 10-19 bg to play, and you can repeat what you did when you were lvling 10-19
in some realms, elixir and food mats are hard to come by, so you need to figure that out how to do it, and also you need a lot of saltwater and 3rd wind pvp potion, each of my 10-19 hunters uses about 20 stacks of salt water plus 8 stacks of 3rd wind, on average .. and you might need some gold to do your enchants, if you do not enchant them yourself, buying them from AH is costly, especially the weapons and rings enchants .. dont forget your glider kit and swiftness potion