I'm not so sure it would really be hugely different to do a similar deck with current cards Scaredgirl. First of all the deck you are hinting towards seems like it would have well over 30 cards (you listed 18 cards so far without any that will dmg them or give you quanta). So ideally I think you agree this would want it to be trimmed down to 30 cards, and since even with the change in this situation both Sundial (free cost, 2 turn delay for all mobs) and Congeal (1 quanta cost, 4 turn delay for 1 mob) are superior to the Ice Bolt (1 quanta, 2 turn delay for 1 mob), you would want to keep 6 Dials/Congeals and probably would end up minimizing the ice bolts to somewhere between 0-2 anyway. Squids may or may not be necessary, I just won my first one recently so I haven't tried it out yet -- I do know that I find them quite annoying when Scorpio has them, but that will certainly vary depending on what kind of deck you are playing. But my overall conclusion was that I had doubts that replacing 1 squid with 0-2 ice bolts that had a 2 round delay would really make a "huge" difference, though that is of course just subjective anyway.
Either way though that doesn't really matter, I agree that 100% chance of 1 round delay is probably better anyway and I think that could be a nice change to make the card more useful.
As to Jellyfish idea about 2 dmg every 5 quanta, this would make the card stronger than even fire bolt in damage alone so that does not make sense. It needs to do less damage than fire bolt, but have some other somewhat useful function as well. Currently the side effect is not really useful at all because it is too low of a chance to rely on, so if you want to cast the bolt on a creature that has more HP than you can deal with the bolt, you are better off waiting until your quanta is large enough to kill it with the bolt outright (in which case it doesn't matter if it freezes).