To me, Frozen Orb is more fun and works great vs lots of weaker enemies, but its not strong enough for 3+ player game. If all you play is single-player, it will do just fine.
Ice Blast + Blizzard can carry an 8-player game (or do ubers with the sunder charm) and takes some getting used to, plus you have a few points left over to put into telekinesis/es (I suggest making Memory in a +3 ES staff and only spending points on Telekinesis). Its old, its reliable, its a bit boring.
I have been experimenting with a hybrid of both and I think it might be the sweet spot. You will not do as much damage as pure blizzard build above, but you will have frozen orb and the combination of weaker blizzard and max power frozen orb is pretty decent. For my build, I maxed Frozen Orb, Blizzard, Ice Bolt, Ice Blast, lots of points into mastery (I think at least to -150%), then add your 1pt wonders (static/telekinesis/teleport/frozen armor). If you have points left over, you can dump them into Glacial Spike for general blizzard damage boost or Mastery to kill immunes faster. Might be some tweaking required, but thats the general idea.
This post was edited by Sanek2k6 on Oct 22 2022 03:01pm