Well, the case made by the Horus Heresy novel "Nemesis" notwithstanding, Eversor aren't really the type to fit in to any sort of group. They're really sorta just 'fired' at a problem and everyone ducks until the fighting is over, which is when they collect the assassin if it is still alive.
That said, the Kill Team being at the scene when one suddenly lands and begins slaughtering everything around it is always a fun moment in a game. In a Dark Heresy campaign I plan to eventually run for some friends, I know I certainly plan to include a moment like that (also them getting to watch a live vid-feed of Exterminatus being enacted on a planet, and other various horrors), where the acolytes are clearing through some cultist stronghold, or traitor fortress, when they suddenly see It down a long hallway from them, slaughtering its way closer through their very preoccupied enemies... but I'm getting off track here.
Nemesis is good inspiration for if you want to have a more social Eversor in your game, or any other Clade of your choice. As for how to build the Assassin, I'd suggest using the Vindicare as something of a base to work from. With the exception of how Vanus are depicted in the novel, they all seem to possess varying measures of agility, and they're all supreme examples of human beings in one way or another (often augmented even further).
I'd suggest letting an Eversor activate as many glands as they want at once, and as a free action, as the whole enterprise is second nature to them, not to mention their system has been extensively modified to withstand the high stresses it's under. I also just remembered that the Gland War soldiers found within one of the Rogue Trader books (Into the Storm?) would also be a good place to look for inspiration.
I'm also sure someone somewhere has already written them up and posted them online.