I've played one, pretty fun. Stealth is a natural fit, of course. Poisons are a nice addition, and archers can take excellent advantage of the "slow" effect. Early on the buff you get to damage from the Dark Brotherhood hood is crucial, of course. If you have Dawnguard, I strongly recommend upgrading to crossbows. You just need two smithing perks (steel then later dwarven) to build and upgrade the crossbows, as well as create your own bolts. Crossbows are a great "sniper" weapon, for really big damage up front, but then they're slower to load. I also carry Zephyr (an abnormally fast bow you can get pretty easily from that same DLC) which I use if I need to take on multiple targets at once (where the crossbow's long reload time becomes problematic).
An easy poison for archers to remember is Deathbell+River Betty. This is an extra potent damage health poison as well as a slow, and the ingredients are really easy to gather in large quantities.