If you're worried about performing well solo at 60 rather than getting there more easily, then I'd go ogre. Iksar AC bonus won't make a big difference (AC on this server doesn't make a big difference, period), and the regen bonus won't make a big difference once you have Torpor. On the other hand, frontal stun immunity will help you a lot if you're trying to solo difficult monsters.
Also, don't delete your alts! You never know when you'll want to play a different class for a little while. Why put your future self through the trouble of releveling a character when you could have one ready to go at whatever level they are now?
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