Well, no, it was my own method. As it turned out, an inefficient one =] The idea is to find the cheapest way to get those bonuses.
You and 112000 made a good point: rotation (or is it better to say "reduction"?) of players is the key to spend less condition. 8 * 27% = 216% total CL.
112000 have reduced this to 4 * 27% + 4 * 18% = 180%, and this is current record. I haven't tested it yet though, I lack necessary players. I'm gonna do that today or tomorrow.