Any GOOD solo spots?

Usually I will constantly boss durring my 12x's. Like the above user said try anego, or you could also try soloing papu (you've got enough HP to survive bottom bombs I think) and do that every day. Also, try and get some friends together to start a zakum squad and do two runs every day. Not only will this be fairly decent exp, you won't get bored from monotinous solo training and you'll also make a bit of meso/gain some bossing experience. Once you're 13x, training gets quite a bit better in terms of finding people to party with.

I haven't been on in a while, so I don't know how the DC situation is doing, but if things like anego or what not are prime targets for being DCed its probably best to avoid such places.