1) I think that is what most of us are forced to do. It would be fine if DD's and monsters ever sit still. But they don't, so you'll miss.
2) Trick Attack only increases your damage while making life annoying for them.
3) lol, Good luck with that.
4) Remind them that Trick Attack has the same recast as Collaborator. Which is neither here nor there because Trick Attack generates enmity based on damage and Collaborator steals 25% of that players total enmity. The effectiveness of which depends on a whole slew of things. How much enmity the already player has, whether its the start of the fight or near the end. If you plant a TAWS on the for example at the start, the mob won't even look at you after collaborator.
Also if you are using collaborator just to convince someone to allow you to use trick attack, you cannot use it to save a mage, or a DD that is really in trouble.
I don't know, to me it just doesn't make sense that the solution to the problem of a job ability that gives unwanted enmity should be a second job ability that takes some away. Why not just fix the problem?