Recently, I've been playing T2 Lockdown as a Recon gunner. I usually use a Magnus and Alchemer (Cryo for now, but I'm thinking of switching). My technique is typically: Cloak - Move in - Uncloak - Fire 1 shot - Cloak fast - Move - Repeat.
I've got a Gunslinger hat and I was thinking about getting a sash. My question is, with this technique and these 2 shot guns (I try to avoid reloading), how useful would ASI very high (from gunslinger kit added to recon cloak) be? Would it be a better idea to use a more defensive kit (e.g. Quicksilver)? I should note that I carry an antigua, but it's mostly to break blocks, and I don't carry a pulsar and would rather not.
Admittedly the ASI isn't that big of a boost. Full Gunslinger would help though, but it depends on your current armor. Quicksilver may be nice though for the Shock Resist, which is one of the more annoying statuses in LD.
For alchemers, the two options are Voltech or Shadow. Shadow is more for damage, and Voltech is for the shock.
The Antigua is good for the broad area sweeps it can do to reveal other recons, and to disrupt the enemy movement. If you see two people in a slap fight, shoot at one and that will stop them mid strike. If accurate, you can completely paralyze someone.
In lockdown, its best not to limit yourself and disregard the Pulsar. The Pulsar is one of the easier ways a Gunslinger, especially recon gunslinger, can deal with Strikers or defending a point. It's use comes from its ability to cover a huge area with death. Strikers rely on being able to maneuver in a large enough area, but if you can cover most of their maneuverability area with Pulsar shots, they cannot dodge as easily.
Also, most Gunslingers that I have seen go Striker actually. They excessively kite around the place. Whenever an enemy striker boosts up to then, they boost away and take shots at their pursuer.