The Deck-Garage Forum has all you need, but you must consider "what kind of combo should I make that can shut down my opponent and storm my way to victory?" I do not play unlimited and can only give you limited advice, but I will ask you to also consider a few other things:
Lass - Trainers are the basis to all unlimited decks and Lass can immediately cut the heck off your opponents strategy, forcing them to play without the supporting cards they need.
Speed - The faster you setup => The faster you kill => the faster you win
Pokemon - THIS IS A MUST! You must consider ALL pokemon from base to up if you want to build a decent deck. Otherwise, you might miss a crucial card that could greatly help your deck.
Special Energies - This does not apply often, but there are many different energies that could help your pokemon in ways your opponent wouldn't expect.
But hey, I'm no expert.