You can’t enter raids or Bc dungeons until level 30.
The way people do it is:
-
level to the level you want to twink at
-
if this level is 10-19 or 20-29, chromie time to BC dungeons and lock your exp. farm items using the dungeon finder, you get scaled drops with gem slots on them. Get artifact weapon and upgrade it as high as possible using BoE relics (I think you can get to 52 ilvl).
-
if the bracket is 30-39, get carried through SOO mythic by a high level, takes an hour and you get a full set of epics usually. You can also buy the old gladiator gear with gem slots. Once you hit 39, legion greens are the best items for this bracket, because they scaled weird and they’re really OP. Especially since they can drop with gem slots on them.
-
if the bracket is 40-49, level to 48, lock EXP, go farm rares treasures and BoEs in SL zones because the gear is OP for that bracket.
-
50-59 twinks are mostly old toons that cleared M nyalotha or people who didn’t buy SL.
-
at this point, find gems and enchants that scaled weird. Like, for example, ring enchants. “Accord of mastery” says it gives +9 mastery, but at 35, it only gives 5 mastery, but the tooltip doesn’t show this, so it has to be figured out. All enchants more or less have these broken tool tips. Crusader is the best enchant for any strength class at any level, it procs 100 strength at any level. Jade spirit is best for any intel class, it procs 25 intel in 30s bracket. I think dancing steel is best for agi classes.
-
gems. The best gems for 10-29 are going to be the ones that used to come out of black temple (epic +3 or +2/+2 gems). The best gems for 30-50 are from Bc heroics. Shattered halls drops a 5 strength 6 Stam gem and black morass drops a 5 intel 6 stam gem. There is no agility gem, so the best agility gem comes from the gems in Dragon Soul (+4 agi)
-
at that point, you basically just want to look for OP items. BOE Item drops scale 4-5 levels below the character it dropped on. So if you farm boes on a character that is 34, you will get items for level 29. One example is Singing crystal axe (boe drop). I have one on my warrior that scaled up to level 39 and it procs like 40% haste or something dumb like that. These items have to be found, some have been mentioned on the XP off website I linked.
Note: this is if you are actually going all out to twink. Most of the time you can just get a few pieces of gem gear, enchant it, and you’ll outgear 90% of people in leveling bgs
Double note: dungeon drops in chromie time scale to your characters level. Only the world BoEs and greens do the 5 level scaling thing I talked about
Bonus points: when you get to level 30, the old “valor” vendor in old town (ally) or top of horde leader building in orgrimmar sell blues with gems on them and a ton of versatility. You can get a full set of this gear for ~500 gold. It will out do any leveler and nearly be on par with twinks in the 30s.