Bhu, that last sentence in Rend is redundant. The maximum should be LESS than the total number of mouth stalks that hit in order to put a limit on the Rend. You've used a range 1d6+2 that doesn't make sense. A maximum shouldn't have a range, that's why it's a maximum and it should be less than the creature's total number of mouth stalks. Did you mean the maximum should be 8 (1d6+2 at best is 8)?
A rend attack that can do 11d6+33 is excessive for the CR. This makes the creature really badly unbalanced and a TPK if it hits first. That's why I put the limit to 5d6+15 in stead of 11d6+33.
Eye Blasts should be every 1d4 rounds not once every 1d4 rounds since that is also redundant. Attacks happen once every X rounds or every XdY rounds.
Darkvision is still one word.
Debby