^ pretty much that
IDH is also good at level 1 (7kish, compared to 12k-15k max with 2k str)
For myth, I guess ice pillar would be the best of those to max. Since the monsters are huge, it would hit up to 6 times. Nuke level 4+ lets you use it safely against any boss, Nuke level 9 lets you use ice rain shower safely on any boss, which makes things a lot faster.
If ^ means incandescence by "ice rain", i'd say keep it at level 1 if this is for myth. Every time it hits, it brings separated monsters a little bit closer to each other, which also makes things a lot faster. If you cancel it at the right time, it hits one more time after it's cancelled, which gives you plenty of time to IQ (for AEH bonus) --> tele.
Whirling is good if you want to safely teleport to the middle of a mob. Just whirling-->tele (yes, that's in the right order).