t3a + t6b
I have such an issue with these resources and in comparison to t6cc which I have in excess, is annoying, I have to max out the bgs and glory store in terms of t6b/t3a for only 1-2 rank ups.
Am I missing a source for these or what? An increase in r4/r3 materials means this problem will only get worse overtime. They should at least raise the cap on them.