I dont know if concur means yes or no but I've been in quite a few TH8 only clans and been a fully maxed TH8 for a while I find 3 starring another max TH8 a walk in the park be it dragons hogs or gowipe, sometimes even loons get the job done, but all the official TH8 only clans use this gowipe comp majoritarily, 2 golem, 2 pekka, 16 wizards, 10 wb, rest arch I think 6 arch fits in? fuzzy memory, anywaaaaaaaays here's a vid of me 3 starring a max TH8 with that exact gowipe comp:
https://www.youtube.com/watch?v=Jsk8Vuq86CI (raid starts at around 3min) I only used 2 rage spells, and I didnt drop my CC, but idk maybe pushing and raiding all the TH9s and TH10s buffed my raiding skills lol, in comparison raiding a TH8 is so much easier, the key to gowipe is directing the flow of your golems and pekkas through out the base, so you have to look where defenses are layout of, eg. if all the defenses are along the sides your golems wont possibly go to the core or stay near the middle so your wiz/pekka might die off early because there are no defenses near the core, also wb usage is important but I dont think there's much needed to explained with wb, wb + rage works very well, use it to send troops to the core, Gowipe is very effective at TH8 you just have to know how to use it, I think all the people who couldnt 3 star with it at TH8 need to go back and try again because its very good if used correctly, I think TH10s and TH9s forgot how to raid because they get such OP troops and cc troops n spells and stuff at their level, esp the AQ