Oh you will use it - more often than you want to in fact...
In the consulate with the cursed reverends. Perhaps there is a better way but I had to keep fleeing battle to top up source from the bodies by the waypoint shrine to bless all the bits of necrofire to stop them spawning. A longer cooldown for bless would make this battle even more irritating than removing the SP cost though...
Challenge accepted. I completed that area without using Bless once. Out of combat, I used Vaporize + Pressure Spike to change the permanent Necrofire ground surfaces into 2-turn Necrofire ground surfaces.
In combat there wasn't time to wait around for that, but I had Tornado on two people (although one could only cast it with +1 Aero amulet on), plus my Knight temporarily switched to a Unique Staff which came with Tornado, so with three of those, I was able to clear out surfaces that way as well.
So the surfaces were not a problem, and I cleared them out nicely. That fight was a piece of cake.
The problem isn't really that bless costs 1 SP - I don't mind really. The problem is that 3SP skills are so much more powerful you don't feel like using points for anything else. Well I don't anyway.
I'm going to disagree, the source point cost is the whole problem, because enemies get so many free ways to curse things that trying to use Bless for counterplay with Curse is just futile.
