RG + Old Ben combo

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I am having trouble beating this team. Rg taunts and right after old ben debuffs and game over for me .

Qgj (lead)
Rg
Old ben
REY
Yoda

Arena ready toons with high gear and lvl in my diposal are

7 star - qgj , lumi , sid , dooku, gs, ig 86 , ig 88 , phasma
6 star - luke,fives( waste of resources i know
5 star - poogle,daka,poe,rg

My dooku fails to land stun on QGJ most of the time and my Qgj's humbling blow hardly ever works on RG's taunt

Any ideas how to counter this team with what i got?

I am currently farming daka, poogle, rg and few others

Thanks in advance for your advise.