Archers have okaystats early in the game but make up for it with the possibility of critical hits without having to equip runes (though adding crit hit runes improves those odds).

Warriors have the most hp at the start but also the lowest starting mage defense. Good attack strength. Also comes with the ability to counterattack upon being hit.

Blademasters have so-so stats aside from the good regular attack. They start with the ability to dodge attacks.

My personal favorite is the blademaster but the other two have their perks as well.