Somewhat unrelated (well, actually quite unrelated, but here we go) I've tried different ways to use White or Black Bull for Pangaea. Never occured to me to take Earth for a White Bull, have to try that, I've somehow missed that one from your guides Baalz
Anyway, with Black Bull you can with (EA) Pan get some nice results in SP very early on. Notice, never tried the following in MP, altough I did consider it for the on-going MP Magellan, but scratched in the end.
Black Bull with Blood 4 casts Sabbath Slave, Attack Rear. There needs to be a few other slaves around (I had the pleasure to have some indy astral ones), else the fatigue can become a problem. Need two Pans as Slave Masters casting the usual self-buffs (Summon Earth Power, one of the skins, Personal Regeneration etc) and finally Reinvigoration and retreat off the field (or use a bow, if happens to have one). If astral mages are available, then one astral mage can cast the astral buffs (not to mention those astral-air amazons who can buff the air stuff too, and I still cant stop drooling at how a astral Crystal Priestess would have been able to buff Holy Avenger on the Bull... drool... sadly never got it to work), as long as he has the Retreat order before the Reinvigoriation is cast.
Anyway, with the help of three Pans the Black Bull becomes quite a killer machine without the needing to cast the buffs himself. Indies actually did seem to rout before the Pans had retreated off the field.