1- Dissipation shield isn't a problem as I'll rewind his creatures and he will be forced to play them, therefore wasting his quanta until I break through. And no one plays Diss Shield in PVP1 now-a-days
2-Mono-aether is killer anyway. Nothing to do about that.
3-Both of these cards are very rare in PVP1, and I always make sure to use the precogs to see my opponent hand. If he has explosion, I play and fly it in the same turn. If he has fire bolt, I play it and leave it there.