A general fills 6 skill-book slots (main + assistant combined); Mayor and Duty Officer have only 3 (no assistant). 'Develop Strengths' rule: Mounted->Attack, Ranged & Siege->Range, Ground->HP & Defense. Range and Speed can ONLY be raised by skill books, so they are high priority; Range books work for ranged & siege only, Speed books for mounted & ground only. PvP loadout per role: Attack, Defense, HP, March Size, March Speed, plus Range (ranged/siege) or Speed (mounted/ground). Siege HP/Defense books add ONLY 25% -> low priority. Monster hunting (mounted-based, one-round kill): Luck, Mounted-Attack-vs-Monster, Mounted Attack, March Size, then vs-Monster HP/Defense. HP is preferred over Defense (fewer injuries); Defense is nearly meaningless vs bosses (a 5000% Defense buff barely reduces boss damage). Wall/Defense: ranged & siege Range/Attack plus ground Speed/Defense. Mayor: Rebirth, Training Speed, Training Capacity. Gatherer: the 4 gatherer-speed books + March Speed. Troop-type buff books do NOT work on Mayor/Duty Officer.
Original research source: Evony Guide Wiki
