Some units in some codicies are badly costed. We all know this.
Which units would you recost, what values would you recost them to, and why?
N.B.: Bear in mind that codicies are not meant to be equivelant; a unit with identical stats and equipment should not be identical in cost in two different armies. Think how much more valuable a Land Raider would be to Tyranids, given that they have no APC of their own. You must consider the unit's value in relation to all other units in the army, as well as the army's play style.
I'd reduce the cost of a no-gun Carnifex to 50 pts. The plasma blast would be 10 pts. Twin-linked devourers would be 35pts, TL deathspitters 20pts, and everything else as it's currently written.