[Drax]

you are mis-interpreting the spawn wording. yes they must be in as few units as possible, but if you have 4 spawn total, either way you are going to have 2 units. Whether you have one unit of 3 and another unit of 1 or you go with two units of two is up to you.

as for the havocs, why not go with missile launchers if you want horde crowd control where necessary? that way it is cheaper over all and although you would still need to divert attention away from armour to deal with the critters, at least you will have 3/4 useful weapons rather than one useful weapon and 2/3 overkill weapons.

i still think your CSM squads are too small to be effective though