Zurai said:
It's very misleading, misleading enough to be a falsehood. Your implication was that there aren't enough monsters that make non-AC attacks to make a difference. The truth is that most monsters do have non-AC attacks, and that for the most part only minions and low-level monsters only have vs AC attacks. You are attempting to equate number of attacks on the books to number of attacks that actually get used. How often do artillery or controller monsters use their melee basic attacks? Rarely if ever - but they all have one and they're all or almost all vs AC. Similarly, a lot of soldiers and brutes have ranged basic attacks that they will rarely if ever use. However, all non-AC attacks are likely to be used in any given encounter.
Using your statistics, 60% of monsters have attacks that do not target AC.
If those non-AC attacks are used 100% of the time by 100% those monsters, then 60% or less of all attacks are not affected by Shield of Faith.
Dropping that extreme improbability from 60% to < 50% is not a big of a stretch. The designers did not give monsters AC attack options for them to not ever be used. And in fact, using your statistics, only 49% of heroic monsters are capable of using against defense attacks (which is <50%). In non-heroic campaigns, there are more ways to boost healing than there are to boost AC, so my point still stands.
Even if 60% of all attacks are not against AC, Shield of Faith STILL prevents a lot more damage on average than Cure Light Wounds ever cures because CLW effectively negates one+ hit 100% of the time (and at high level, less than that) once per day (assuming that the target didn't die or or didn't get smoked for even more damage due to a condition or didn't lose a lot of combat actions due to a condition), and Shield of Faith negates ~20% of hits and any condition damage that hit would do (50% chance to hit drops to 40%) 40+% of the time for many attacks against many PCs once per day. If there are more than 12 total attacks for all of the NPCs in an entire encounter combined (on average), Shield of Faith is better (and that's just taking into account damage, not monster attack condition protection).
Since it will almost definitely be <60% of all monster attacks in most campaigns, Shield of Faith is even better.
Plus, the user of Shield of Faith does not need to use it on an average encounter. He can use it on encounters where it helps more (such as minion attacks or attacks by creatures that prefer vs. AC melee or ranged attacks).
The only one being misleading here is you. You use words like misleading and false and dishonest a lot in posts.