I personally put a bunch of ACC in (~17) mainly because it was cheap and I wanted to continue to progress on my relic without being stuck on that step due to indecision. I can always change a single stat whenever I want (don't need to redo the entire thing) so it's not much of an issue. I'm currently sbing/saving up for more CRT/DET IV's to replace some of my ACC with but I'm thinking I might just keep the ACC (and maybe add more) as I missed a miasma in T4 of all places at i118.