Is there anyway to determine the time taken for a spell to hit a target? I've a spell which once cast deals damage, even before the missile collides with the target and am looking for a way around this, please advise. 
[Edit] Perhaps there's a math sum which involves dividing missile speed with distance between caster and target unit of ability being cast?

[Edit] Perhaps there's a math sum which involves dividing missile speed with distance between caster and target unit of ability being cast?