Sorry SE, but endgame won't work if you don't fix something.

[complexxL9]

I think this can be summed up in one sentence:

When I escape the AOE before the cast bar finishes I want the server to recognize it, nothing more and nothing less.

I'm not exactly satisfied with that sentence. It would only improve an awful experience to mediocre one.
Telegraphing and animations should to be perfectly in sync with casting times.

In other words giving the titan example - cast bar finishing, plumes exploding and player dying, should all happen at the same, exact moment, and dead body should never be lying in non telegraphed area.