Pokémon Aquamarine E4R2 Routing Ideas

Same start
Skip badge 1
Still get Abra
Beat Hideout then Grass/Ice gym, then grab Fly HM and enter Lavender, teleport back to Andromeda and do Gym
gentleman: Rock Slide Raichu (can Slash, but risks para)
Jessica: Iron Head + Slash Magnemite, Rock Slide rest (ranges on all, could Dig but is a 2 turn move and risks para on Flaaffy)
Fly back to Lavender and get Nature Mint, force Adamant
Skip Tower Rival and ghost as normal
After getting Surf and Strength, fight Alex then fly to Stellar and go to Silph (skip Silph Rival)
Grab the Master Ball
Fight "Sabrina"
Fly to Solstice, skip Secret Key and fight Dev (likely a shitty fight. May need a Salac Berry)
Do the Sevii Islands stuff
After Sevii, Fly to Andromeda and skip badge checks as normal
Fight the E4 (a bit better since Exca will be higher level)
Postgame is generally normal, but need to grab Rock Smash HM. Perhaps deposit all fodder mons for the Tactix fights?
Maybe catch Mewtwo for the E4? Would likely struggle immensely against the dark leader. Kyogre is also L70, so could be an excellent option, and may be accessible as soon as you beat E4R1 (moveset Surf, Ice Beam, Calm Mind, Signal Beam)