if you are looking for more synapse might I suggest a TEq killer int he form of the Zoanthrope? He gets a blast that kills marines and an ap str 10 lance with a 3++ 2 wounds and gets two powers besides his two form psychic shooting attack.
Szarekh, the Silent King
in my mind.
Don't worry you foul little creature, I have no intention of killing you today. Come stand next to me and watch your world burn and understand the meaning of the word futility.
My Tyranid Log