The links besides Hieratic Seal I only used in 1 game, but all of it was needed: Striker Dragon to make an S.P. that banishes (a Kashtira Birth), then into Promethean into Amblowhale to out my opponent's Kashtira Tri-Heart
Dharc, Kubelt, and Blackrose Moonlight Dragon never came up.
Only a single opponent actually asked to see my Trident Dragion; all others just conceded when I started making my attacking plays in the Battle Phase.
Droll came in clutch against a Chimera Melodius deck
In the side there was no need for Dimension Shifter or Heat Wave. I opted to keep it more safe. Rivalry way too strong to ignore, though.
The Kashtira Fenrir package was great for a threatening board presense, and also a great turn 1 summon in case I'm made to go first.
Koa'ki Meiru Drago I rarely sided in, and it never came up.