Yeah, the dtilt isn't that great. I was just thinking of an attack on the top of my head that could block it. Not saying it should be used in a match unless necassary. Which I don't even think its necassary when you can just jump over them.
Something that could stop them from using their projectiles for a little bit is quickly throwing a grenade at the opponent. I wouldn't throw it fast because it would probably just fly off the edge.
Just press B and let go...that's all you really need to do. Once the grenade gets near the IC, it will most likely explode because of the swing of their hammers plus the icicles. Same also goes with Pit. But, be a little more careful if you are throwing grenades at him.
Once you are close to the IC, I would sidestep dodge. Because, I don't think you want to be grabbed like crazy.
Personally, I would short hop into an airdodge once I am right next to the IC. Just to get some space and be able to attack as soon as you hit the ground.
Haha, I forgot about the cypher! It's good for getting near your opponent. Just get ready to airdodge frequently after it.