Taking my sorceror as a baseline, he's Cha 20, Dex 16.
So, Dazzling ray does:
6d6+Cha+Dex = 21+5+3=29
Ice Javelins does:
1d10+Cha+Dex+ongoing 5=5.5+5+3+7.5=23, 3 times = 69. Yes, you need three targets to get this much out of it, but even with two you're looking at a lot more damage...