- Pick up Ether before Bill
- Swap slot 4 for X Accuracy in fly menu (3 if early drill)
- Swap slot 4 for Super Repel in pokedoll menu
- Use Ether (slot 2) in Silph instead of Elixir
- Skip picking up Max Ether before Victory Road
- Use Max Ether as normal in Victory Road (use on menu after water)
- Use Elixir after Lorelei instead of Max Ether
- Blizzard Onixes on Bruno

GOOD
Ether saves 2 steps / turnframe to pick up
Ether shorter name than max ether
Ether higher slot than elixir in Silph (saves 6 inputs)
Can blizzard onixes on Bruno
Extra blizzards for Agatha

BAD
2 extra input in cut menu
1 extra input in repel menus
1 extra input in fly menu
1 extra input in pokedoll menu
double input x acc in tower (arbok) and silph rival

Hwangbro timings:
misty split: +4.05
surge/fly: +0.595
flute: +0.57
lorelei: -4.389
bruno: -0.938

diff: -0.112

(this assumes perfect luck, in a run there are various things that can happen which can make ether faster or slower, so overall it's personal preference. I will go with ether for the extra safety of having more blizzards in E4)