I'm just leveling a rogue now and haven't played a ranger in box group, but some tips I've read in other posts. Ranger is a nice addition for buffs to melee groups. In bow mode there are low maintenance DPS but a bit behind Zerk/Rog on output. Rogue is all about getting an ini that uses all their talents correctly. If you can keep poisons up, I think they are close to Zerk dmg.
Your best DPS will be building towards SK/SHM/BRD/BERx3 but the cleric as the healer is a little more stable if you're doing tougher content. 3x Zerk lets you run alliance for a DPS boost as needed. SK/CLR/BRD/BST/BER/BER is more endurance regen if you want to run in chain pull mode.
Wiz is nice if you want an easy toon. They don't look like bots when KA runs them and you get ports. They do better DPS if you have Ench, Mage or other Wizards as those all do group DD buffs on certain nukes, but even alone they are usually 2nd best DPS to a Zerk.