That might work with the Victron, no idea. Something better work or else you will get to hate the thing IMO.
My Tri does not have the "three things" set at all; I use it as is out of the box.
It seems to be designed for a draw down from full (zero AH) then a complete recharge (pos amps) Once to "full" and draw down starts again, it goes to zero AH. But what if you stop the charge before the batts are full as when doing 50-90s or you are on solar and you don't get to full that day?
So it does not need to have anything to do with the values set for your idea of "Full" to reset. I have no values set for that. What triggered a reset was when charging stopped (pos amps) and amps went negative now only battery draws are seen. As soon as the green charging light went out at sundown, it reset the AH counter to zero. The batts might be at any SOC.
Doing 50-90s, I think that should mean as soon as you stop the charge and you go back on battery draw, the AH counter would reset, which would ruin your count, but I just don't remember.
With the auto reset off, 50-90s do work right with the AH counter showing where you are since the batts were full and it was reset to zero. (Big thing is to remember to reset the AH as soon as you get to the campground and before you start running the batts down or you will not know how far down you are by the time you remember to set the AH counter.)
One of my complaints with this is you can only reset it to zero, so even if you have a good idea you are down say 30AH but the AH counter is at whatever number from before, you cannot set "-30" you can only set "zero" and then you have to "carry -30" in your head when reading the AH counter.
