Speaking from personal experience with devices - you ought to take smoke grenade and drop time bomb unless you're simply using it to mule. With one hit debuff enhancement smoke grenade does something like -6.2% hit, which is really useful in any given situation, and i've personally found time bomb to be entirely useless in practice. And i think you really should 6slot lancer shot and penetrating ray, as they are your primary st damage dealers along with piercing beam, of course. You're also missing 3% def from the unique steadfast protection enhancement and i'm not sure, but i think that chance for recharge you have slotted in Kick will only ever proc if you're actually using the skill, since you have it slotted in an active skill. And put a celerity +stealth in your sprint, i'm pretty sure it stacks with the fieldops stealth.
p.s. if you decide to go with pistols, which have KB only if you're NOT using any of the specialized ammo, look in this thread - dp/dev discussion