I use the .52 and the .52 Deco. The Standard .52 has the Splash Wall, which is quite useful for preventing the enemies from inking the point, and the Killer wail; while not as good as an Inkstrike or a Kraken, Is still quite good at forcing Enemies into a less favourable position. Set the wail across the point and you get a few seconds of coverage as they get out of the way. On maps like Walleye warehouse the Wail can cover the whole point in a good spot. The Deco's got Inkstrike. All I really need to say.
Gearwise, I typically run Resistance,Ninja Squid and Special saver. Keeping that little bit of extra special if you get splatted is useful when it's it's getting close to the opponent winning.