Coyote

I've mapped out a few Ice Control characters who are tremendously strong defensively. They all have something in common: a strong -ToHit effect. Time, Rad, Dark and even Plant secondary all turn Ice Controllers into super debuffing Controllers. The mobs still attack... slowly. And often at each other. And for less damage than usual. And the little damage that comes through is easily healed. So you can build Ice Controllers who are strong on the defensive side... their -Recharge adds to those of the secondaries, and their Immobilize and KD abilities reduce damage even more, and the Confuse adds to that. You're not stopping mobs from acting, you're just making their acting almost irrelevant. The problem with them is damage, especially low-end. I'm not sure where it could be added, or if Arctic Air's Confuse effect should be a bit stronger, but while they can play very safely, they don't do much damage. The Prestige attacks help a lot with this, but I don't like saying that a set is fixed because it has Prestige attacks available to it.

In most gameplay, Earth works well with anything since it has such good control. I like /Rad also with it, since Earth has -ToHit from Earthquake... stack it with Radiation Infection for flooring just about every mob. However, two interesting choices are Thermal and Cold. Either one of these will allow you, if you take the Pet Defense/Resist IOs, to have Stoney tank AVs. And since both of these have -Regen and -Resist, you can actually damage the AV solo. And you don't need to build an expensive character. Which makes this one of the cheapest AV-soloing characters out there, though not especially fast at it. And both builds would be excellent for teaming.

Not sure why so many people seem to think phantom army does knockback, they definitely do not. If that's what you meant. He meant Phantasm