If it ain't broke don't fix it... And with your 78 grains behind the point you are above 200 grains up front. Have to add the insert too...
Shoot what shoots the best out of your bow, a lot depends on centershot or lack there of with each particular bow also.
Sounds like you have found the combination that works for you, stick with it. I'm a tinkerer, and like to try a lot of different things, but when I find a combination that shoots where I look time and time again I set it aside and stick with it for that particular bow. I'll even write it down so I don't forget what works.
Best, Jeff.