<br/>Hm, I think you're right about the order. Trying to think of cases where it'd matter - characters with 'reroll one failed d20 per day' type abilities? who might then waste them?  (I think miss chance still applies to natural 20s, but if not that'd be a reason.)<br/><br/>Attack roll first probably is more conceptual for IC interpretation in any case (especially on ranged attacks). If nothing else, the results will help Rose gauge the enemy's accuracy for subsequent tactical decisions, so I'll start posting both together.<br/><br/>The single d100 is from 36%=100% - (100% - 20%)^2, just saves time vs rolling two d100s. I'm not sure if this is a direct rule, although srd gives an example of this for Invisibility vs Blind-Fight.<br/><br/>If you like to know which layer of defense caused the miss, for characterization or other purposes, one option is to consider a roll of 1-20 implies the 'first' layer (whichever that is) caused the miss, then 21-36 (one-fifth of the remaining interval) caused the 2nd. But I could do pairs if it's a strong stylistic preference; not much slower thanks to E's batch rolling.<br/><br/>Garland's ranged attack rolls (with the modifiers, although only with one of them can you tell!):<br/><br/>19<br/>23<br/>nat1<br/>9<br/>