I secondary Ike and it's ridiculous how Fox and Falco, two characters with already good recovery, get to side-b out of up-b but Ike doesn't.
Anyway, I use Furious Eruption, (Tempest in casual matches) Aether Drive, (cause why wouldn't you want better recovery) Close Combat, (see previous point) and regular counter. I think Ike's counter should be buffed though. I find it harder to hit than Marth's/Lucina's, and it would make more sense for Ike's meatier sword to deliver a better blow.