Took awhile and sort of a bit rng reliant and def dupes reliant, but just in case! Hope it helps someone c:
No EXs at all for this battle!!
#Lorelei Pt2 No Limited Units
grizzled blaze
does soph want 5* and lvl 140? yes, i really think so. it was very close damage to get to proc endure, which let last words work (if endure is still active, last words does not go through it) and let me win the battle. though, if getting better rng (i got no sonia pots at all i dont think), it could maybe be doable with him at 4*
sonia needs 3/5 for her pot mprs, and her tm mpr to max crit and def/atk for soph so his dps is maxed
attack order: i got rid of starmie first, then synced lapras and finished it off, to then focus on slowbro, which made the fight much easier
my first sync turn order
Soph TM -> Sonia TM -> Volk Thunder Fang
Volk Electric Terrain -> Sonia TM -> Soph Wild Charge
Volk TM -> Sonia TM -> Soph Wild Charge
Soph Sync
hopefully this helps someone! 
sudden prawn
This was definitely the team I had in mind! But I thought I would have to ex Sonia first so I put it off, glad to see it’s doable without
Is there anything notable from volkner’s grid? Mines 1/5 and I thought I would just take terrain mpr
grizzled blaze
Is there anything notable from volkner’s grid? Mines 1/5 and I thought I would j...
thankfully the most important thing on his grid is his mpr which hed really like to proc it at least once so you get 3 uses of ET which is available at 1/5, but i think it should be doable with him as 1/5- though that might require a bit more from sonia and her potions, since volk wont get access to first aid or shock recovery which helps quite a bit especially due to the aoe moves, but i dont imagine it has that huge impact on the fight
mine had def crush to help with sophs dps, but its such a low proc rate that honestly as well you can ignore it, and sonia has def crush9 already as passive, though mine usually couldnt get to attack often due to being busy buffing or healing since they deal a lot of damage
also, ET should run out before enemy syncs as well- i wouldnt use it again immediately until after slowbro has synced, since his next move after that is psychic terrain which removes ET
as soon as you see psychic terrain queued, queue ET from volkner, bc starmie if still alive will use psychic which will delete sonias existence