Reverse time isn't as much of a problem as you'd think. At a cost of 5 quantums the chargers can be replaced endlessly, and I tend to have my otyugh defense up from the second turn onwards.
The pulverizer is only meant as an anti-weapon device. If they bring out a weapon that is dangerous to me, I'll bring it out. Three things can happen:
1. Their weapon gets destroyed in the next turn
2. They steal it, and their dangerous weapon gets replaced with one which is fairly useless against me (since I don't use any permanents)
3. They deflag it. Still 5 extra damage for that one turn, and it only cost me some earth quanta (which are abundant)
Most of the time I keep it in my deck, unplayed until the final turn.