I noticed with Path of the Anima, that the Greater Path Possession mentions that they no longer need to spend a spell point to create an elemental creature with their possession, but at no point does it say in the possession description that there is a spell point cost to making the elemental for the possession.
Edit: Also, on the table regarding maximum elemental size, the 2nd level elemental you can possess states that it has half HP and BAB, but for the purpose of whose BAB you use while possessing a creature you use your own BAB, not the target. And it also states that the elemental only exists long enough for you to possess it and dissipates once the possession ends.