Aye, I agree that if you want a 'non-magic ranged dps class' then hunter with rogue is the way to go. Besides the obvious huge damage improvement from rogue being good, having a slow effect (poison) on arrows is pretty much crucial too.
Combining a dps magic class with a non magic class is generally prolly not a good idea because you can't specialize in the attribute points very well. Of course this only matters if you want some optimum build, the fun factor is a totally different story.
I haven't really looked into the best caster builds yet. Storm and Earth seem very fun (especially storm) but combining the two together seems rather pointless since they both have a spray attack (ice shards/fireballs) and some type of AoE lob bomb. (They also both have a pet and a melee boost aura, etc..)
Depending on how much mana is a problem I think Spirit is best with Earth & Storm too. This time not because of the HP leech from the aura but because of the +energy regen. Unless those rogue dmg mods can somehow be applied to spells too due to some freaky game mechanic. ^_^
But most other abilities of Spirit might not be so complementary to a dps caster...
As for rogue, duel wield from warrior seems very nice in theory but I haven't really tested that yet.
So far I'm only certain about Defence + Spirit being best as tank and Hunter + Rogue for ranged dps.
Anyone else got some other ideas?