You should definitely rely on the lactate test rather than the breathing test for the establishment of your Aerobic threshold. So use 157 for now. The spread between your aerobic and lactate threshold (179-157=22) is a bit over the 10% we’d like to see but this does not mean you can’t or shouldn’t use some high intensity training in your program now. You’ll see benefitsIf you have a planned trip/climb/goal coming up within a couple of months then I’d recommend using the weighted ME progression. If on the other hand you are not pressed for time I’d keep working on that aerobic base to get your AeT HR with 10% of the LT HR.
So make the call based on when you need to be at your highest fitness in this training cycle.