Well you still have everything from melee, down-throw dair, ledge handoffs and stuff. Some new stuff to try out is down-throw side b, or into footstool with Nana(you footstool with taunt, and they can be teched. Sometimes you can regrab them, but if they miss you can jab-reset, or tech chase)
also there are some new desyncs, and not all of Melee's desyncs work(this is the part of the guide I'm working on double and triple checking which ones work).
I also you should check out the top ICs to really see them put in work, Phresh, Sharkz, Hylian, Fumbles(hard to find anything recent) you also check the community combo thread to see other names that I may have forgotten or that I dont know. The ICs are still very underdeveloped in this meta, more and more people are picking them up and more importantly more and more are getting good. Everyone that plays this character, as far as I'm concerned, has something you can pick up and use.