I just did 6.4 100% and it was not bad at all. 6.4.1 / 6.4.2 / 6.4.4 I did 100% first and it cost me roughly only 1000 units. 6.4.3 / 6.4.5 / 6.4.6 cost me roughly 3000 units. I don’t have a ghost (she’s nice for a ton of paths) and I have a quake but only r3, I hate her play style . I just watched a few videos on YouTube for each chapter before I did it and it helped finding some cheeses and easy counters for paths. Just plan ahead and don’t rush and don’t be afraid to back out of a path if it goes wrong and just buy the energy instead of revives. I’m a big CAPIW guy and I got a science t5 to take my duped 6* to r3 so the rewards were worth it. I did use both of my CAPIW’s a lot when I could since you take 0 block damage which helps a lot with the huge attack ratings of the champs in 6.4.
I just did 6.4 100% and it was not bad at all. 6.4.1 / 6.4.2 / 6.4.4 I did 100% first and it cost me roughly only 1000 units. 6.4.3 / 6.4.5 / 6.4.6 cost me roughly 3000 units. I don’t have a ghost (she’s nice for a ton of paths) and I have a quake but only r3, I hate her play style . I just watched a few videos on YouTube for each chapter before I did it and it helped finding some cheeses and easy counters for paths. Just plan ahead and don’t rush and don’t be afraid to back out of a path if it goes wrong and just buy the energy instead of revives. I’m a big CAPIW guy and I got a science t5 to take my duped 6* to r3 so the rewards were worth it. I did use both of my CAPIW’s a lot when I could since you take 0 block damage which helps a lot with the huge attack ratings of the champs in 6.4. Ok so on a safer side 5k units worth if i slipped here and there.Right now I’m doing 6.4.2 without any units and i find bosses not that hard as were in 6.3.I’ve soloed that Thor all the time