A 2-class group: who would you pick?

[Brista]

It's just stupid to compete over all the drops in the game as you progress, so avoid combos like Priest/Mage or Rogue/Druid.

You overstate this, I think

Druid needs staves, leather with Int/Spi for caster mode, leather with Str for cat dps

Rogue needs one handers, leather with agi

Both benefit from stamina

When one adds in the benefits of stealthing through to bosses in instances, of one of the pair taking leatherworker and making gear for both, and of the pvp advantage of your entire team being able to stealth I think the pros outweigh the cons