I remember seeing a droid team hit top 50 not too long ago with:
HK(L), R2, BB8, K2S0, and IG-88
This team was pretty good on offense, but when I saw the team and fought it on defense, it was pretty simple to do, as long as you can survive it’s first wave of attacks.
But then again... no team is good on defense, though, I would imagine you’d become a greater target simplely for using a different team
Otherwise, droids are pretty decent in raids still, but are slowly becoming obsolete, since there are better team combinations that have a higher dmg output.
Hope this helps!