I always build 1 squad of melee units, 1 squad of the most powerful archers, and definitely a Capitol + Castle first, then only troops with upgrades, and only at the end, magic and guilds (this is if the castle isn't magical). If it's a magical castle, it's all the opposite, except for the Capitol + Castle (the AI doesn't know about rushing).
I always build 1 squad of melee units, 1 squad of the most powerful archers, and definitely a Capitol + Castle first, then only troops with upgrades, and only at the end, magic and guilds (this is if the castle isn't magical). If it's a magical castle, it's all the opposite, except for the Capitol + Castle (the AI doesn't know about rushing).