Kind of confused by the OP’s request. There is an indicator at the very top of the screen next to any other status effects on your character. It’s small and pink with a countdown beneath it.

But aside from that, it’s second nature to me to immediately cast verlightning/verstone, etc. just before he initial spell’s cast completes. And when I’m on the run from AoEs and such, I just glance up to the top of the screen to see if I have DC.