victoria4,<br/><br/>Being prone won't let you use ranged<em>weapons</em>other than crossbow. You can still use your ranged spell-like ability, and you got it right. Because spell-like abilities funciton as spells though, you have to overcome SR with them, you got that right too.<br/>Heroism doesn't give a plus to your caster level check to overcome spell resistance however. :( It only boosts the rolls specified by the spell description I'm afraid (attack, saves, skills). Getting better chances at overcoming SR takes Spell Penetration (boosting your caster level check by 2).