Heya!
We are doing the exact same thing. Running lvl 50 raid to 60% and whenever we accumulate a lot of tickets, we run a lvl 40 concurrently with the 50 to 100%. Extra rewards
We are also doing the tier 2 Thanos to 100%.
For me I am running Capt, Drax, Xbones, Gamora and Yondu for a defensive squad in arena and it holds really well
For attacking I replace Drax with Quake.
When you have 2-3 nice AOE's with a few taunts and then a Gamora to clean up, things work smoothly.
My team power is just over 70k and my collection is around 165k.
I've been playing around with Raid teams and I have been strengthening up Night Nurse and Wolverine for those. Wolvie, Night Nurse, Capt, Yondu and Gamora is my main raid squad and they get me through the full raid without needing to heal outside of battle. During the weaker nodes I put in Xbone, Quake, Hawkeye to build up the ability points to use their ults. Then when I hit a strong boss node I send in all those ppl to nuke it
Lately I have been pushing more on SWGOH than Marvel. I recently 7 starred Thrawn and I just 7 starred R2D2 and now Palp is going to be back in a few days