I think that as long as you don't see any yellow (nothing below 300) you could take the dose up to 1.5, even this may not be quite enough as she was on 2.5 units of prozinc, I hesitate a wee bit, though because there are some significant gaps in the prozinc data where we can't be absolutely sure that she saw some lower numbers.
So tonight get that pmps and then get another check before bed, and take it from there.