Hey guys, couple of questions that I'm sure has been answered befor, hope someone got the time to help me out though

If I want to setup a FTL, how do I get IS to detect which character I have as focus? Is it only done through focus? Is there any other way to do this?
I'm not using a focus based targeting system normaly, rather a assist based, but I'm guessing you're kind of forced to use focus if you use ISBoxer to set it up?
If I wanted to add a condition to my attack chain, say I want to include my priest in my attack chain, untill the point where I need to heal with it, is there any way to do this? Could I have them attack all together untill the point where I press the hotkey for the first heal?