Well your right I did play fast and loose with the concept of slot less - a true slot less item would be an ioun stone. But the original concept is not all fluff, a horn allows the user to wear a head slotted item. Consider it the cool stuff you could wear on your head versus this silly helm that doesn't protect against badgers, elephants, town guards, and most slaads.
The people I play with do tend to start the day with 10/min buffs extended once the PCs hit level 8 or so. These buffs, in the game I play in, tend to be all day buffs greater than 90% of the time. Play styles will change this - exploring large overland areas versus dungeon delving would obvious effect how long the adventuring day is. The key difference between having 2 horns and a wand of protection from evil is with an one hour buff you have a pretty good chance of already being buffed before combat. Perhaps, I tend not to face as many cunning foes who always debuff the party. as you do.
Magic circle can be used offensively to retroactively protect the ally who is posed by the vampire. The single person protection from evil can not do this. Thus in my opinion magic circle is substantially better.
After reading the comments of the thread I'd say the bigger complaint is protection from evil is underpriced - not what should it cost compared to the closest magic item which is a horn of goodness in my opinion. Keep in mind this is all opinion versus hard fact.
The people I play with do tend to start the day with 10/min buffs extended once the PCs hit level 8 or so. These buffs, in the game I play in, tend to be all day buffs greater than 90% of the time. Play styles will change this - exploring large overland areas versus dungeon delving would obvious effect how long the adventuring day is. The key difference between having 2 horns and a wand of protection from evil is with an one hour buff you have a pretty good chance of already being buffed before combat. Perhaps, I tend not to face as many cunning foes who always debuff the party. as you do.
Magic circle can be used offensively to retroactively protect the ally who is posed by the vampire. The single person protection from evil can not do this. Thus in my opinion magic circle is substantially better.
After reading the comments of the thread I'd say the bigger complaint is protection from evil is underpriced - not what should it cost compared to the closest magic item which is a horn of goodness in my opinion. Keep in mind this is all opinion versus hard fact.