You should really post your full roster. We can't see enough of it to give proper commentary.
But just from the high-level, I expect something involving Elva + Aniri to guarantee 3-turn SPDUP and Block Debuffs, and Rathalos and Geomancer for damage, plus someone with Leech should do the trick. Might even be able to do some crazier shenanigans with 2:1 or even 3:1 rotations around Seeker and Elva.
Okay, first thing's first - you really need to stop sacrificing champs to +1 random people. The benefit just isn't worth it, given the VAST majority of the ones you chose to improve are not very good to begin with. Faction guardians will do *way* more for you.
To your specific team - I think yeah, unfortunately I don't see anything to enable an unkillable/block damage team, so you're probably going to want to go with a standard rotation - the specific speeds are quite flexible, I did some quick numbers in DWJ and looks like you want between 125 and 145 speed on everyone
1) Elva - lead, MUST be fastest
2) Aniri - MUST be 2nd fastest
3) Rathalos - any order, doesn't matter
4) Geomancer - any order, doesn't matter
5) [someone with leech] - any order, doesn't matter
The person with leech is pretty flexible too. I see Vogoth, Yannica, and Ghrush as all being valid choices. Depending on who you choose, you'll probably want one or two champs in Toxic sets. As always, make sure everyone has Warmaster/Giantslayer, no TM boosting masteries, etc.