Engineer leveling
Crafting, maybe, to get a few more levels? It’s not too hard to get the materials if you run through lowbie areas, gathering T1 items, and sell them en masse.
I just hit 50 and it felt like slamming into a brick wall. I’m going to just play my guardian and ele to get mats to craft up a few levels I guess. Or go back and complete low level zones I’ve already done on other characters until I hit 60. Fuuuuun.
I don’t think I’ll be crafting 18 levels. Even cooking doesn’t have that kind of XP bomb.
Then try a different build; HGH isn’t -necessary.- I made it to 80 using nothing but Turrets – you know, those things that’re kind of like gimpy kits that only have two attacks, can’t move, don’t scale with gear, die in a few hits and will almost certainly never get sigils at all? It might not have been easy, or the best build ever, but it worked.