I used my insane roulette luck with four 6* tickets to make a dreamy Sun team from scrap:

I used it to not beat Electric Moth because I don't have a Kerria wall here.
Or I guess I could spend all my R-medals for centies and push them over lvl100. and add some 3rd affection bonus as cake toping.

Anyway, I found something very interesting while testing it. Actually, you can stack more than 300% Sun with Gauge filling abilities. It will cap at 300% but refill with remanings abilities after using it.
That means, you can actually build a solid Sun team and a side team with girls like Lily or NY Jersey Cudweed for solar bonuses. You can even add some other girls with Gauge ability like Ume for more extra sun or Gauge memories fillers and allow your team to fire 2 full sun blast turn one (one before your turn and another right after). May be very powerful to nuke every problem.
I didn't tested it on Whaleship but it may work too. I guess.