Just max out whatever tier its currently on. If you have 0 to 99 in support, make it 100 to get the next conversation. If you have between 101 and 299, make it 300 etc. The editor tells you the ranks on the right side. I simply went through and maxed out the current ranks, setting them to either 100, 300 or 600 and I unlocked the next conversation between every single character. Some still require story progress though, even if you have the required support EXP. I have now seen every rank C between every character, with quite a few Bs and a couple As. Doesn't seem to have a downside as long as you don't go past the maximum EXP for the support rank they currently have.
Yep, thanks, exactly how im doing it. So is A 500 and A+ (the 2 lines in the ones that requires it) is 600, right? So if you use 600 you would miss out the first conversation (first line) in that support, i think.
I maxed them at 301 and can confirm, it wont show the support. I needs to be 100, 300, 500, etc.