The Thesan on my Titan. That is all you need.

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Learn how to control the recoil. You can get near laser like spreads if you do with any fusion. Just try aiming down a bit while blasting. It helps me with getting the snipers with fusions. Also, try to anticipate enemies and try to use cover to your advantage. For me, I use my radar to locate someone, the as the come around the corner, I blast them with just enough time so they show themselves and I'm already shooting. Also, get used to your charge time. You have to to know exactly when to start charging, you don't want to get caught still charging. Also don't fire while in the air, us the airtime to tour advantage if you jump down etc. It's hard for the enemy to shoot you when you are falling etc. Use the time to charge, then when you land, you blast them accurately, use your scope as well! Hope this helps... [spoiler]I'm a guy that uses fusions all the time, I hate snipers and shotguns :)[/spoiler]

Lots of good fusions out there now, rushing with long far gone or similar fusions work. I highly recommend plan c, perfect for countering rushers or using at medium range with perfect balance. Hit detection on most fusions is good out until like 30ft now, which is half of what it was in year one but still useful enough I suppose. Long far gone, thesan, Pahnta rhei are all good including plan c