What types of powers do [enter archetype] get in their primary line?
Blasters get many ranged attacks. Defenders get accesss to powers that Heal, Buff, Debuff, or provide other support effects. Controllers get powers that disable the enemy, Hold, Sleep, Stun, and so on. Scrappers get a variety of melee attacks. Tankers have access to many different ways to avoid, or reduce the damage they take in combat.