So, I don't really care if people respond or not. Probably not even going to check back, but I just feel that this needs to be said.
Screw Mi-go, and the Visitant in particular.
15 charges of invisibility on a wand, 3 attacks that automatically get a grapple attempt on hit, hit AGAIN on a successful grapple, and apply 2d6 sneak attack dice EACH. Then ability score damage on all 3 of those grapples. Then the ability to summon monster 4 in a level 3-4 dungeon.
This son of a gun could have one-shot our barbarian if it jumped him from invis. Our swashbuckler gets caught in its triple death grip. A) HOW does one creature grapple 3 times? I have two hands but I only grapple once while using both of them. B) What kind of bullshit AC does this thing have that a swashbuckler can't knife it while it's flat-footed with bless and a DEX of +4? C) What does it freaking do to my body that I need a Resurrection spell instead of a Raise Dead at level freaking four? D) Our spellcaster was useless because this thing has immunity to cold, resist electricity and fire 10, and DR 5/slashing. That's one of our biggest sources of damage and this thing is largely immune to an entire party member.