The Neural Node is fun, though you have to keep in mind that all of the bonuses provided by the formation are tied to the Malceptor, so you really don't want to expose it more than need be.
Psychic Overload has the potential to be dangerous, but I would only suggest using it against things that buff the entire squad (banners, icons, relay drone, etc.) and special/heavy weaponry rather than squad leaders and characters due to look out sir. Most of the warp charge dice should be reserved for Neurothropes and their broods though, as a good Spirit Leech attack can be devastating (not to mention provides some charges for powering a follow-up lance strike elsewhere).
Also just because: