Thanks for your help improving my deck, concerning the 4 QT, I usually see 5 in 30 cards SNs based decks but after playing quite some games with that I thought putting one out for a fifth Chaos Power was working a bit better, maybe its only because I had been very lucky with QT and SNs so far but 4 QT did not seem to be slowing my games that much, I'll consider going back to 5 though but maybe take out something else than a chaos power now.
For the Dune scorp, you 're probably right, my first idea of replacement would be hourglass, maybe precog? For the Spectre/Frog it is quite slower indeed but great to combine with the Rage pot so that is why I went for it, although it might not be the best ^^
Not sure about the mind flayer, the third water quantum needed rarely happened to be a problem and the 2 more HP are quite convenient against Fire Storms and some other CCs which are already very annoying to play against