Feeder
Try the Frenzy Ballistic Flyers and Angry Popper
www.FrenzyTackle.com
Both have caught many nice YFT and BFT intheTexas Gulf.
As far as the Lure Weights goes you'll need several sizes to match the size of the baitfish the Tuna are feeding on...They can be picky at times.
If the Topwater Bite goes wide open it wont matter as long as you can chunk your lure past the bright light circle or about 80yds.
Bazz