Turret triangles work best when they actually defend each other (in each others range. The only trouble is it normally requires a jump to pass them. If you have teslas then they make a good turret defence.
It's not good to have too many turrets floating in the room doing nothing. It's also not good to have all your turrets at the perimeter for the aliens to play hurdle-jump with.
As an alien, I find it easiest to pick off lone/poorly defended turrets and when I see such a turret that's just what I'll do.
There should be a concentration of turrets at exit/entrance routes to bring the aliens health down so it won't attack. Turrets aren't there for killing so much as they're there for making defending easier, for slowing down the enemy, for discouraging the aliens from attacking.
When you talk about them being easy to snipe or not, bear in mind that it's better those barbs are hitting defences than anything else. Defences can be rebuilt.
A general rule for tremulous is "DON'T STAY STILL". Too many people get that 'safe' feeling and just sit there. That's where I normally shoot/slash/shout at them
. So human defenders should stay on the move and support turrets... and attack regularly. camping is okay in short bursts. It's not okay to hide in the base for the whole game. If you do that, there's no chance you'll win. [Best defence = Good offence]
