170 + 170 + 710 + 650 + 400 = 2,100 (170 * 2 for HT and Phleb. 710 for TT combo, 650 for ID combo, 400 for the two 4th combo skills in the rotation).
2100 + 2100 + 2100 + 400 = 6700 (Adding up 3 rotations, plus 400 for 4 GK's)
6700 / 30 = 223.3333 (Total divided by the number of GCD's for the rough average potency per GCD).

Notice, however, that B4B will roughly fall somewhere on the 4th combo out of the 6 in the rotation, if held for a moment, which will become important in a second, then should be back somewhere around 1 when it comes back off CD again. The problem here being that we get 2 GK's on the first B4B and only about 1 on the second. (Maybe 2 with the calculations in the main post in this thread). (continued in next post)