Thanks guys. I'm not sure a poison arrow will work unless i change the mechanics though. So far every shot is a one shot kill, so poison won't be much good as a long term effect. I did this to simplify the game and to remove the need of health and potions/healing. Once you get hit you just respawn. So it has to be some kind of active ability that you use on tap. Like the thief has Dash, to make a quick move, either to avoid arrows or to get somewhere quickly.
Some ideas i've gathered for the various characters that i think could work. I have to figure out which ones fits which class, or maybe you could select between several skills at character selection.
Smoke bomb - dissapear in a mist of smoke, (invisibility/camo),
Catch arrow - hightened reflexes for a short period allows you to catch an arrow shot at you.
Place trap - Place a beartrap to have people stuck for a few seconds.
Magic forcefield - absorbs arrows for a short period.
Tracking - See footsteps or whereabouts of other players,
Place a dummy - Places a dummy that looks like you.
Dematerialize - Arrows go through you for a few seconds.
Lob arrow - A high arcing arrow to hit people hiding behind scenery
Tripple Shot - Fire 3 arrows at once in a small arc.
Spectral arrow - A ghostly arrow to use in case you run out, or to save arrows.
Storm - Deflects arrows for short period.
Blinding explosion - Other players get blinded and have a hard time to aim correctly.
Bonepile - (For upcoming skeletal archer), turn in to a pile of bones, avoiding arrows.
Petrify - (For upcoming gorgon archer), turn opponent to stone for a short while.
Teleport - To a random "safe" location/spawnpoint on the map..