Are assassins any good at tanking even though they have light armour and look more of a DPS than tanking class?

My sage and gunslinger are on a PvP server if it makes much difference. I also heard that gunslingers are not as good as sages when it comes to endgame and so sages are preferred, is this true?

I see where you are coming from but I would like to get one character to lvl 50 before I go back to the rest.

I just wanted to hear some peoples thoughts on which character i should have as my main. I have played all 8 ac's to lvl 15, some further than 15 and im not sure which ones to carry on with. I have a sage, gunslinger, sentinel , vanguard (lvl28), juggernaut(lvl28), operative, mercenary and an assassin. I would like a class which can do a fair amount of damage but also some survivability too. I do both PVE and PVP but focusing more towards PVP. I quite like staying out of main combat and using ranged attacks but it is not too big an issue. I like stealth but again it is not a requirement. One thing is a find vanguard and sentinel get a bit boring after a while so they are probably less likely to be my main. Taking into account storyline ,companions, etc, which character do you guys think should be my main? And ideas would be appreciated.

I just wanted to hear some peoples thoughts on which character i should have as my main. I have played all 8 ac's to lvl 15, some further than 15 and im not sure which ones to carry on with. I have a sage, gunslinger, sentinel , vanguard (lvl28), juggernaut(lvl28), operative, mercenary and an assassin. I would like a class which can do a fair amount of damage but also some survivability too. I do both PVE and PVP but focusing more towards PVP. I quite like staying out of main combat and using ranged attacks but it is not too big an issue. I like stealth but again it is not a requirement. One thing is a find vanguard and sentinel get a bit boring after a while so they are probably less likely to be my main. Taking into account storyline ,companions, etc, which character do you guys think should be my main? And ideas would be appreciated.