Credit to demonchaos on GBGL.
BF 2 (using 30 sd's) use 2.6 power. (2.65 for 74-66, 2.7 from 66-60)
frog (using 30 sd's) use 2 power.
for the frog: shot 1 rolls <<<< and shot 2 rolls >>. there fore u must add 2 of subtract 2 angles to make up for the 3 seconds it takes to roll.
ex. say the creedo's chart says to add 3 angles. your new angle is 84. since you are shooting someone >>> with shot 2, then u must add 2 more angles.