So I went back to some of the tweaks found in
psycho_maniac's awesome thread that helped me out on the 6.1 OS TP2 & tested them to see if they would work on 6.5 for me.
The ones below that worked before still do today.
Change save location of MMS
Another BAttery Increase
Email and Attachments on your Storage Card
Eliminate the lag when taking a picture
save camera pictures to /Storage Card/My Documents/My Pictures
But the main one which I was most interested in & have verified working & is able to survived soft resets is the data connection auto off -
Disconnect Internet after 60 sec's.
This is crucial because I noticed that when you tap on the battery meter in the taskbar before, you see that the timer is still running with live data which is purportedly dormant or disconnected!
But this tweak actually turns off that data after 60 seconds. The timer doesn't show.
I just checked again just now coming back from the Facebook app.
What does this mean?
Well - if it works like it did on 6.1 - the 6.5 battery drain just stopped for me!
(btw - I cheated & used strra's cab that does the same thing & floating around ppcgeeks via search)