I got a really nasty one:
Ice Spike, Blazing Heart, Cloud Kick, Buster Dunk, Fireball.
It took me a while to figure out how to pull it off, but:
1. Fireball, mid distance (to chain into Buster Dunk after ender)
2. Buster Dunk: You need the groundbounce to maintain the combo, given that it's the only launcher.
3. Move back, cloud kick. You need to maintain as much verticality as possible to continue to connect Buster Dunk, so putting a little space in is a necessity.
4. Move forward, Blazing Heart. Similar to 3.
5. Move back, Icicle Spike.
And back to fireball.
At first, I didn't think it was possible. I think that this little loop is pretty much everything this game's about, with the tight spacing and timing it took.
I hope I never have to do it again though.