I use focus for CC (resheep without targetting) and possibly other uses in the future. With only three characters there's plenty of room in the macro for conditionals. I use the nodead conditinals like you. It works pretty well. Of course, there's no [feared] or [mind controlled] test, so using focus might be the best solution after all.

You say it works after a couple of times. It may be that there is some kind of delay before every toon finds out that your main is dead? You could try to minimize the assisting and always try first to cast on your current target. If that one is dead, only then start assisting.

[code:1]/target [harm,nodead] [target=Ðaria-target,harm,nodead] [target=Ðixx-target,harm,nodead] [target=Ðuxx-target,harm,nodead] [target=Ðexx-target,harm,nodead]
/cast feuerball[/code:1]