Ideal mapping for a stage1 remap running the oem downpipe would be a peak of 18-19psi then aim for 14-15psi as long as the ko3 can higher up thre rpm range, then the low VE of the ko3 will cause the boost the tail of to around 10psi -8psi closer to the redline.
18psi peak and 14psi held with AFR of 12.5 will be good for 190+bhp 220lbft all day long, Trying to aim for higher boost when running to oem down pipe will cause heat build up and a AFR of 11.5 -11would been to
help get the egts down but at a compromise to the power output.
Going to stage2 you will need to get the gasses flowing better, ie 3" down pipe, de-cat or sports cat. This will allow you to peak the boost at 22-23psi and aim for 16-17 psi
help while still maintaining a AFR of 12.5 without getting the EGTs too high, The peak bhp from a stage2 remap will only be a few more peak bhp over a stage 1 due the the VE tail off being them same higher rpm, so 200bhp is about the MAX from a ko3. A stage 2 remap should return 240-250lbft and around 13bhp on the average bhp not the peak bhp.
Same with ko3s mapping aim for the load request to produce 18psi peak and 14psi held and it return 210bhp due to the better VE higher up the rpm range from the KOs