Sort out the planning And get a corvus with proxy, nick or maybe a killmonger there
I know it's a bit late now, but any of those champs can solo that fight if the summoner has decent skills. Domino - if you can get her lucky and modok unlucky, she can cause all kinds of debuffs for power if you get the spacing down,Bwcv - you can throw a heavy from the other side of the arena and place stacking damaging debuffs and get power that way, throw 1-2, go in for an intercept, hit twice back off go in again etc,I don't have a Thor rags, so I don't know if he can inflict a shock or bleed debuff, but if he can, he will ultimately hit his sp2 or sp3, etc...
Claire can as she can put poison / incinerate to turn off the stun shield ... after that it is +200% damage on stun so damage goes through the roof But some intercepting is required with good timing to get the first poison going