1-8 solo quests
8-10 RFC
10-20 SFK
20-40 SM
40-45 BRD
45-55 LBRS
55-62 Blood Furnace
62-65 Hellfire/Zangarmarsh/Terrokar Quests
65-70: SLabs / Shatt Halls

Go Prot Pally is enough.