Ok.
I put the resistor in and the two voltage dividers in series so I could effectively measure the voltage drop across the resistor and from that determine the current so it should be easy enough to implement a feedback loop that adjusts voltage on gate of MOSFET to maintain .1A
Threshold is between 2V and 4V but 5V corresponds to 1A so I will never need to get that high so I can definitely adjust my voltage output between 2 adn 4.x to maintain the 0.1A
I am going to choose to ignore temp for now because I know they will be being charged in a steady climate controlled room very close to 20 deg C.
I was following their recommendations but was doing so for cycle service not for standby use and their graph only shows standby use so I was going off of the table a little below that graph and to the left.