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Lothric long sword blessed has a C Dex S faith scaling at +10. I'm not one for trying to get the most OP weapon. So this one works very well. Blessed weapons are definitely slept on due to the meta. Same as hollow builds. Only builds I use lol
It also has S scaling on +9. Same applies for Dark Sword dropped from Darkwraiths.
Other infusions almost always provide more AR (sometimes more than double), and this makes blessed infusion worthless for most situations excluding parry shields. I mean, 2hp/sec is marginal benefit considering you bricked your weapon. However, there are few exceptions, where blessed gem is obviously the best choice (providing you have high faith):
-Lothric Knight Greatsword
-Drakeblood Greatsword
-Dragonslayer's Axe
-etc.
For example, Blessed Lothric Knight Greatsword (24/16/40 str/dex/fth) has 655 AR. At 60 faith it reaches 700. Remember: blessed gem increases >innate< lightning damage the most effectively. DON'T infuse other weapons! S scaling worth nothing if the base damage is halved.
Also works on Astora gs
Blessed Astora GS is a bad idea, Lightning and Sharp versions have much higher AR, so it's out of question.
Sigh. You can start infusing these already after Farron Keep yet there is only a grand total of two guaranteed available for each run in the base game. Quality design.
This article is incorrect: perseverance does NOT increase tick speed for blessed weapons. Time tested with a +10 blessed caestus.