I like mole valley feet and fertility buckets. They are molasses based but not a feed bucket, so don’t provide any extra energy or protein. My ewes have them all year round. I got them the cheaper Mole lyx sheep buckets once and they turned their noses up at them

my ewes don’t have any rock salt, just the f&f buckets. At tupping and pre lambing they get an energy bucket as well.
Any of those licks will be fine though. Or you could bolus if you know there’s a deficiency after blood testing. We had a problem with CCN (vit b1 deficiency) one year so always make sure there are buckets out that contain it now.