Here's the offical level 10 twink PvE Challenge, if you feel anything is out of place or if you want to add anything then post here
10 Man PvE Challenge:
Culuthas
Goliathon
5 Man PvE Challenge:
Moltanus
Raging Colossus
2 Man PvE Challenge:
Volchan
Twilight Prophet
Infernus
Yetimus the Yeti Lord
1 Man PvE Challenge:
The Ray-Getz-Kalaba Monstrosity
Chet the Slime-Breeder
Teracula
Zephyrus
D-1000
Bloodvenom
Raging Ancient
Luzran / Knucklerot (at same time)
Mor'Ladim / Morbidius (at same time)
Ragefire Chasm
The Deadmines
Wailing Caverns

10 Man PvE Challenge:
Culuthas
Goliathon
5 Man PvE Challenge:
Moltanus
Raging Colossus
2 Man PvE Challenge:
Volchan
Twilight Prophet
Infernus
Yetimus the Yeti Lord
1 Man PvE Challenge:
The Ray-Getz-Kalaba Monstrosity
Chet the Slime-Breeder
Teracula
Zephyrus
D-1000
Bloodvenom
Raging Ancient
Luzran / Knucklerot (at same time)
Mor'Ladim / Morbidius (at same time)
Ragefire Chasm
The Deadmines
Wailing Caverns