I think Overlord is the best due to its flexibility, but if you want more options, Wood Elves, Farhaven Elf, and Topiary Stomper are all quite reasonable
Temur Roar I could be a little bit biased here because I have personally been walloped by this deck so many times, but Temur Roar is a highly effective pile of ramp, with some big scary dragons at the top-end, which the face commander Ureni can cheat onto the field with ease
As a three-color planeswalker, Sarkhan is a good pick for your Dragon deck, especially since it can produce Dragons for a relatively cheap loyalty cost of just two counters
Team tournaments are always the most fun, and I cant recommend enough giving it a chance if you can make it
Stats: 4/3 The MTG Final Fantasy Holiday Release features a number of exciting new legendary creature cards, and Seifer, Balamb Rival is one of the best