First focus on Gogeta, his event is up today so do that as best you can. Your villains team should do fairly well as a bunch of them have big bad bosses(BBB), which is the link that heavily increases damage in that fight.
Gogeta is a great unit and powerful gateway, if you can get him to SA 10 do so immediately, he's one of the best damage dealers in the game and makes a lot of fights easier.
Getting Gogeta dokkaned means you have a Fierce battle unit, this makes Super Vegito a lot easier as well, so focus on him next. SV is up today and I think tomorrow as well, as that's AGL day. For SV make a hero team, Gogeta/Vegito Blue FL, SV, SSBKK goku, starter goku, great saiyaman AGL, PHY Bardock should do. Just note that only units linked together with Fierce Battle will do any significant damage in the last phase of the fight, keep VB and Gogeta linked, tank with VB, SV, and SSBKK Goku, you should be able to manage with that and good item usage. Take King Yemma(ox king if you dont have one), Dende(cargo if you don't have some), Senzu, Ghost Usher(another dr item works here as well). That should be a solid set-up for items for most fights.
With Gogeta/Super Vegito you can steamroll most old events, or beat them handily at the very least, like gohan/kid buu. I think the next Dokkan event to take on would be Broly. Unlike other events with damage reduction, Broly's is pretty ass, it's literally just a massive defense buff. A villain team can actually shred that and take him down, might be a bit difficult only because of the damage he'll deal, because you won't have a bunch of dokkaned dokkanfest units, but between Black(must be SA10), Rose, Omega, and Buuhan you'll be able to do damage, getting Buuhan to SA10 gives more attack reduction with Black, so you'll reduce a lot of his damage as well.
. So Ive only done easy story mode.
