I'd probably start with grabbing a +2,
What you do next, depends on that +2, it's not set in stone.
So if she was higher @+2 then I'd give her a break and catch a test at +4 or even +5, if the +4/+5 saw her still in yellows then I'd let her be grabbing a test later in the cycle maybe +8/+9/+10 somewhere in there. Grabbing 3 tests in that cycle would give you an excellent idea of how she is doing on the insulin.
If however she was dropping at +2, that would indicate that the cycle is going to be active (you are likely to see some downward movement), depending on the number you get at +2 you would want to get a +3 or a +4, for example, if she was 150 at +2, I'd want to test no later than +3, as that would be a pretty big drop, if on the other hand she was 200, you could leave it till +4. The bigger the drop you see at +2 the more you need to pay attention.
If were to have an active cycle let the numbers be your guide on how often to test.
Looking at yesterday, when she came up to 261 at +6 after hitting 196 at +5, you could have stopped testing every hour, and maybe got another test in late in the cycle at around +10. If you look at how often I tested George, I didn't do this, I was home and George doesn't mind the tests, so I tested quite frequently even when he was high (pink and red), I think a part of me was just hoping that he would show some response to the insulin, and I was frightened that he would drop suddenly, but with hindsight it really wasn't necessary.
George was also a bit fidgety when it came to shots, he didn't mind the ear pokes. Sienne suggested shooting him while he had his face in the bowl, he loves his food soooo much that this turned out to be a great strategy for me, most times he never even looked up.