For starters your box is super nice, as for teams...

If possible, I'd strongly advise 6*ing & evoing your Light Victoria. When I started I had a similar box, and Light Vic + Water Perse carried me through majority of the content. (Currently running GB10 with Light Nike, Dark Seastar, Water Perse, Fire Arthur)

For GB8 you could easily use something like Light Nike, Water Perse, Gigabat, & Water Nereid or Fire Cottontail.

As for GB9 running any sort of Fire team would work, ideally Fire Minicat (Cleanse), Fire Anu, Lantra, & Fire Boltwing.

Personally though, I skipped over GB9. I was able to run GB7 & GB8 while finding some decent runes in the shop here and there and pushing straight into GB10. I 6ed my whole team and +12/+15'd my runes, but I ran Light Nike, Water Persephone, Wind Hana, Fire Arthur at the time, I also got away with a 5 Hana. You could run something similar with Light Nike, Water Persephone, Dark Hunter, & any healer, though ideally Wind Hana or Fire Cura if you could evo either of them. Dark Hunter would act like a Fire Arthur in the sense that his stun would be huge. It was less of Arthur's AoE defense break that helped me early on, and more of his stun allowing Nike to tank less on the waves and make my runs more secure.

Best of luck :)