I was talking to my friend yesterday about guild items, and i said it is possible to get 100+7. He told me that enhancements cap at +6 and that the mog items DO NOT stack. Now i dont have either and i'm not sure myself, so could someone confirm whether or not it is useful to get both mog items? thanks
First of all, your friend is wrong. The only craft that can get 107 is cooking. That is only IF you are 57 NIN and have the katana. Your natural skill can only got to 100, and for every other craft there are 3 items you can purchase with GP that push you to 103. Adv synth support to 106. For most crafts the last GP item, the super expensive one, does nothing more than allows you the saving grace of not losing as many materials if you break a synth. Unless you don't own the the cheaper GP item. This link says it is actually the moghancement that gives the last +1, not the item itself.
So, technically you could get both but you only get the initial bonus to skill from whichever piece you purchased first. Then you get the additional bonus of not losing mats on break with the 2nd piece, if you purchased the more expensive piece second.
Besides, if the cap was 107, for cloth at least, this would not be 8m.
I'm a man, but I can change, if I have to, I guess.