Sure. Here are some tips in power leveling:
1. Get a good HellFire ring. There is no level requirement. Put this into your new hero, and go do MP10 (Normal) right away!
2. With the Hellfire ring, just do quest. Try to quickly complete Normal as fast as possible.
3. By the time you are in Act3, you should be level 20~. Try to just farm Keeper 2 till you are Level 22.
4. I spent around 500k on 3 piece of Cain set. Worth the gold. Get all 4 set if you want, but for me, I skip the Pant (Cain's Robe). Look for cheapest, but for Cain's Memory, must get one with socket.
5. Get a Radiance Star ruby as well, slot into your helm.
6. By now, just complete Normal, and head straight Act 3 Nightmare (MP10). With your current gear, should be able to reach level up to level 42/43.
7. If Nightmare MP10 seem hard, time to upgrade your chest and pant with high Vit or socket them with RS amethyst.
8. If mobs take long time to kill (more than 3 hits), upgrade your weapon.
9. Once you hit level 42/43, go to AH, look for level 60 weapon with reduced requirement! Can get them cheap at like, no need for weapon slot, etc. At this level your Crit Dmg RS Emerald is not much use. Get one with high DPS and cheap.
10. With that, complete Nightmare.
11. Now, get a high level friend to host Hell MP10 Act3 for you. Just follow your friend close to suck XP!
12. Level 50-60 is less than 1 hour!
. Not as fast as yours truly but definitely working
.