rocket belt is trash, frag belt is better as it doesn't have a 99.99% chance of blowing you up upon activation and contributes a bit of extra dps as it is not on the gcd.
Synapse burst is where its at, other than that it's just a neat profession with all the gadgets.
Jeeves Blingtron Goblin Glider Rocket Boosts Synapse Springs
Credit for the creation of this awesome signature belongs to Shyama