You really need to settle on an AT and powerset combo before you start asking for builds as there are so many possibilities, even for soloing. Looking at the AT's you mentioned the following sets are good for soloing:
Corruptor Secondaries: Dark, Rad, Traps and storm are all good soloing secondaries. Basically any set that is made up of mostly debuffs or buffs that are usable on te caster will work well.
Corruptor Primaries: Fire, Sonic and Ice are probably the best, but really any primary will work when paired with a secondary that prevents incoming damage in some way or another.
Dominator: All dominators can solo. Some power set combo's will be better at low levels than others. For example, mind control is awesome at low levels as you get 3 good single target controls (mesmerize, dominate, confuse) and 1 up every spawn AE control (mass hypnosis) by level 8. You add 3 more AE controls at higher levels (mass domination, terrify and mass confusion) but you don't get a pet. On the other hand, gravity has very little control at low levels giving you only a single target hold, single target and AE immobilize and the usual long recharge AE hold prior to L26 where you get your first up every spawn AE control (wormhole) but apparently the pet is awesome at controlling (I don't have personal experience with it, I haven't had the patience to level a gravity dom or controller past about 10). All the dominator secondaries are pretty good now as well, so pick your combo and run with it.
Controllers: Mind, Illusion and Plant solo best and you can pretty much combine any secondary with those although some of them won't add much to a soloer (force fields for instance). The other primaries can be soloed but may be a lot slower up until 32 when you get your pet.
Blasters: All blasters can solo but they tend to require a different playstyle than most other solo AT's. Barring a couple of secondaries (ice, devices) you have very few active or passive defenses so you have to hit hard and fast, expect to take damage and die sometimes and work up tactics that let you hit and run a bit. I don't play many blasters as I can't stand soloing most of them past the mid 20's when the incoming damage gets to be too much for simple hit and run, so I can't really give you good advice here, except for the two secondaries that let you play a bit more defensively - ice and devices. Ice lets you leverage ice slick to prevent mobs from closing with you and shiver to reduce the incoming damage so you don't have to hit and run as much. With devices you can use caltrops in the same way as ice slick and you can combine cloaking device with other def boosts (combat jumping, +def IO's and IO sets, etc) to get a decent amount of ranged def. Caltrops + ranged def + trip mine fields make a hard to kill blaster but the playstyle is a little slower and more deliberate than most blasters and a /devices blaster won't group all that well as their best tricks take more time than most groups are willing to allow.
Settle on an AT and powerset and then we can start discussing builds but until then the above advice is the best I can give without turning an already long post into a dissertation.
Globals: @Midnight Mystique/@Magik13
With the new difficulty settings you can go for anything from spawning +4 bosses to take advantage of single target dps; through to -1 level, no bosses, and spawned for 8 to let an AoE heavy build tear through the massed weaklings.
Soloing is what you make of it. You don't have to pick something to fit the game any more, pick something that looks fun and adjust the game to fit.
I just recently came back to CoH after almost a year... And I don't team well... I was wondering if anyone could give me some good Solo Build ideas for Scrappers and Brutes and if there are any good Solo Builds for Corruptors or Dominators or maybe even Controllers or Blasters?
I have a 50 Necro/Pain MM - 50 Fire/Kin Troller - and 50 Shield/Fire Tank...
So I'd really enjoy a build for a Brute, Corruptor, Scrapper and Blaster.
Would be much appriciated.