Cerberus = event boss, top SPEED-UP source. Mounted. Relative strength: L1 slightly worse than Ifrit B11, L2 ~Behemoth B14, L3 ~Phoenix B15. Zero-wound cavalry: L1 68.2M = t12 220k; L2 153.4M = t14 1.595M; L3 234.2M = t14 1.931M @+1384%; L4 694.9M = t14 2.664M -> ~60k wounded. Doctrine (all normal/most event bosses): fight with only the single highest tier of MOUNTED cavalry, one wave, to one-round-kill for zero wounds; buff mounted attack first, count second. Skill books: Mounted Attack Against-Monster Lv4, Mounted Attack Lv4, March Size Lv4. Add an AGAINST-MONSTER debuff (not a normal debuff), e.g. Dragon Equipment Set (4); monster Def debuff caps at -50% (5x set). In a rally only ONE joiner needs the against-monster debuff -- it does not stack across joiners. Monarch Talent Lv6 'Mortality' halves wounds. Rally-join = 1 general + 1 mounted troop (loot-agnostic).
Original research source: Evony Guide Wiki