Gladiator, Hawkeye, Treasure Hunter, and Warlord can do Int/Men symbols in this guide (http://www.lineage2.com/guide/guide_symbols.html) .
But this (http://www.lineage2.com/Knowledge/enhancements.html) page says that Int/Men symbols can do only battle mages: Human Wizard, Sorcerer, Necromancer, Warlock, Elven Wizard, Spellsinger, Elemental Summoner, Dark Wizard, Spellhowler, Phantom Summoner. And it's really true.
Please fix "Symbols and Dyes FAQ" (http://www.lineage2.com/guide/guide_symbols.html) page.