Before I start on why they could use some love I am going to list their effects for those that are unaware.

Thrassian Stranglers does the following
on kill gain +23 weapon and spell damage
on kill lose 120 maxium hp
on kill lose 1% sheild effectiveness

The above Effects stack up to 50 times and last up to 1 hour, sure you might look at that and go "huh, kill 50 things and get +1150 weapon and spell damage at the cost of 6K less max hp and 50% weaker sheilds, seems alright to me", and it it would be not for the following issues

Crouching removes all stacks
going invisible removes all stacks
sneaking removes all stacks
dying removes all stacks
going through a loading screen removes all stacks
removing the strangles removes all stacks
You only gain a stack if you deal the killing blow

So taking the above into consideration you can very well see what I mean when I say the as they currently stand the stranglers have zero pratical utility and should be shown some love in one form or another, I am no balance expert but an example of some of the love that would be nice to see is listed below

Thrassian Stranglers
on kill gain +400 weapon and spell damage
on kill lose 1200 maxium hp
on kill lose 10% sheild effectiveness
on kill lose 5% healing taken
Going stealth, invisible or crouching removes all stacks
removeing the stranglers removes all stacks
dying removes all stacks
Stacks last 5 minutes and stack up to 5 times
You gain a stack on killing blow or if the enemy dies within 2 seconds of you damaging it

Or anything else suitble enough to give the stranglers a use outside of puttering about overland 1-shoting mobs that already die in 1 hit anyway

And for the record I am NOT saying buff them back up to be as overwhelmingly powerful as they were when they initally released, that would be dumb