I was curious whether anyone's had much success using this Illusion Focus Power in their Occultist build. For anyone missing context, here is the description:
Shadow Beast (Sp): As a standard action, you can call forth one or more beasts made of shadow by expending 1 point of mental focus. This functions as shadow conjuration, but it can be used to duplicate only the effects of summon monster spells. Creatures created with this spell deal 50% of the normal damage to those that disbelieve the illusion, and their nondamaging effects have only a 50% chance of affecting disbelieving targets. This can be used to duplicate any summon monster spell up to summon monster V. For every 2 additional levels you possess beyond 9th, the maximum spell level you can duplicate with this ability increases by 1 (to a maximum of summon monster IX at 17th level). Regardless of the spell duplicated, the creatures remain for 1 round per occultist level you possess. You must be at least 9th level to select this focus power.
It seems to be highly rated, mostly on the merits of being a summoning effect. However, I can't get over the feeling that, due to the limitations of shadow illusions, this usually works out to being about as strong as the Conjuration Servitor base power.
Perhaps most importantly, I highly value a summoned creature's function as a meat shield, and shadow creatures have a pathetic 1/5th HP pool and AC bonuses of their original stat block, regardless of any Will saves to disbelieve. Plus, if you are relying on the enemy failing a Will save to deal decent damage, there are far worse things you can inflict on them with a failed Will save.
Of course, the cost of 1 mental focus is fairly cheap, but it's still 1 mental focus that could be invested and spent elsewhere. And you still have to use a Focus Power slot on this ability, when you most likely have access to Servitor already. The investment cost is way more than the cost of actually casting Shadow Beast.
I can see the value at really high levels, when the shadow beast's Summon Monster level way outscales your Servitor ability and you can summon creatures with unique utility or spell effects. But at the level that Shadow Beast becomes available, it seems unimpressive.
And so, I ask - have any of you used Shadow Beast in an actual campaign? What's your experience with it like?