High temp regen runs indefinitely: help!

im working on a 2010 WS 4700 with a DD13 engine.
Came in DPF was 84% clogged had it cleaned the other active DTC was intake mani pressure sensor replaced that as well. Now all active codes are gone except the infamous 3719. Which in theory all you would have to do isn’t send it through regen and bam done. Not in this case it will run for hours and never go above 813 degrees. Doser valve should kick on around 900?? If I remember correctly. I have tested the following and all are good.
Turbo
Jake brakes(in spec)
Egr valve works on command through DDL
And I monitored it seems to be fine. Closes to 85% during regen
ITV works
Doser valve and block(new)
Fuel filters (new)
Air and baro are within .5psi
I can’t figure this out

 

Update: doc inlet and doc outlet temps are around the same and both peak out at or around 800 degrees and stays at that temp

 

I tested the EGR and the egr is operating correctly I also monitored it during regen it’s 85% closed.
As far as pressure if I remember the inlet was 0.034 outlet was 0.00

 

350k

 

Blew out the DOCs during regen I have DPF inlet- 0.363
DPF outlet- 0.072
DOC inlet temp-813
DOC outlet temp-779
Fuel doser-0.0%
Fuel cutoff valve- 0.0%
Baro-14.43
Intake mani - 14.71

 

I replaced temp sensors and I’m getting same response I’m currently doing a DOC face plug cleaning hoping it fixes it if not I’m quite sure it’s gonna need a new box