my rad/dark defender is lvl 41
i got the phalanx and the atlas medaillon accolades
about solo, i can tell you won't be able to hunt with a rad/dark as soon as you reach lvl 39 ... i explain, i soloed 90% from 1 to 41, at 39 i didn't want to hunt into brickstown ( mobs 39's max ) so i went to Peregrin islands hummm , i ran out of endu even with 41's minions ^^ , so bosses were impossible to defeat...
With the new epic power pools, i'll do the respec and get the energy one, will get conserve power and 6 slot it ASAP.
Actually post 39, i think the better way to level is to team with a damage dealer ( 40% damage bonus with a huge accuracy bonus , RI + tactics )
By the way , i got life drain and my advice: don't get it ( or get it just for the visual and sound effects
)
Another advice, don't play a high level fire tanker for a long time because you won't play your rad/dark defender without thinking and screaming " OMG i'm so weak, [censored] with the experience bar ? " ==> my fire/fire tanker is lvl44 ( soloed 90% also ) i played 250 hoursto reach this level, 500 hours to reach lvl 41 with the defender
