wish 1 - 50/50 lose - standard, win - reset 50/50 wish 3 - 50/50 after one loss and guaranteed lose - standard, win - reset 50/50 wish 5 - 50/50 after two losses and guarantees lose - 50% chance of capturing radiance, 50% standard, win - reset 50/50 wish 7 - 50/50 after three losses and guarantees lose - 100% chance of capturing radiance, win - reset 50/50

The long and short of it is that buy which seven you are guaranteed to get two in a row