Mr Ears,
You are rightly confused, shaft profiles can be a mine field, you really need to work backwards and forget the terminology x tiff, reg, or whatever, they are utterly meaningless. As a GENERAL rule;
high swing speed = stiffer butt section
tempo = slower tempo suits softer mid section, higher tempo suits stiffer
fast transition = generally suits stiffer profile particularly the butt
late release = generally suits stuffer tip.
On top of this you have to factor in your angle of attack. First thing I would do is have the head checked, my old DCT was a 10 and actually measured an 11.5, (hence why i went to an SMT).
Look at your overall swing, how fast your transition is, what is your tempo and how early/late the release, this can help narrow it down.
Imho the Acculaunch plays soft to flex, I use the 80g in stiff in my Geek 3 wood for that very reason, I just get some extra height. The Evolution on the other hand is one beast of a shaft, very tip stiff and will flatten out trajectory for most players.