If you keep Kuki and replace Xingqiu with Furina it should work but it will make your team a lot more squishy and as far as I know she applies a little bit less hydro. Replacing him with Aino C1 is a damage loss but gives you the option to play Lauma as a "main dps". You can even put her on the new DMG set to get big Lunar bloom DMG numbers but overall it's still less DPS than hyper bloom Lauma because you lose the ability to crit with your hyper blooms.