All stealth vs All casters vs Balanced Group

[nodoze]

The general consensus on Rogues is that, in addition to being squishy for a melee, it is hard to optimize their DPS for Boxing so generally it is best to have at most one in your boxing group and drive from it and maximize it's DPS (especially if you have a particular reason for needing a rogue like you want to main one).

Generally speaking the most balanced group to farm with is Tank+3Ranged_DPS+Healer and the fastest for farming is 4Ranged_DPS+Healer (typically avoiding bosses at least while leveling).

Generally speaking the best Ranged_DPS are Mages with Warlocks being second with pros/cons. Generally speaking it is best to go all the same DPS though, for the extra utility (summons, rez stones, health stones, stamina buff, etc), many folk will go with 1 Warlock and the rest Mages (2 or 3 depending on the party composition).

Considering you already have a 60 Warrior I recommend you level 4Mages+Healer to cap, with a Mage on your Warrior account, and then at cap you can substitute in your Warrior for the boss fights where you feel like having a Tank helps the fight.

If your 60 Priest is on the same account as your Warrior I would consider leveling a 2nd Priest on one of the other accounts as Priests (especially Dwarf Priests) are the best all around Healers and that would allow you to have Warrior+3Mages+Priest for boss fights. If you are Alliance a Paladin Healer can do much for a Warrior lead 3Mage team (and still help a 4 Mage team with blessings/aura on top of healling) and though I love Druids a Druid would be my last choice for a 4Mage (or Warrior+3Mage) team unless you really just want a Druid at cap and don't see yourself leveling a Druid any other way...

4Warlocks+Priest also work but if you go that route I would definitely do Priest as the AoE healing really helps Warlocks.

Edit: For leveling 4Mages+Healer or 4Warlocks+Priest I recommend you review the following link to help you get to cap the fastest:

https://docs.google.com/spreadsheets...#gid=566752830

Lots of great info on the various tabs of that spreadsheet but in particular I would focus on the 2 links in light blue (cyan) on the 'Leveling' tab as they contain links to great guides leveling teams (especially mage heavy teams). Both are a little more Horde-centric so if you are Alliance I would use the 'Leveling' tab to get to Scarlet Monestary where the guides work fine for both factions...