High Relic teams getting nuked.

I notice that where some of those say that the same person did two battles "less than a minute" ago, one has a banner count and one does not, so it may just be a visual thing of the same battle (Because that is just saying how long ago it was, not how long the battle took).

The 100% win rate is impressive, maybe even questionable,  but it looks like a guild conglomerate and many players have MΔΛR in their name, so they may just be that well organized. I didn't see any GAC cheating in a cursory glance (obviously did not look at every player, and didn't go too deep in, but I did look at at least one of the accounts in your pic).