Hello there, I am a huge fan of the beastmaster subclass of the primalist class. I have seen decent solo companion options for every type of pet except wolves. It would be really cool of there could be a node added to the wolf skill tree, maybe called “Alpha Wolf”, which would grand 50% size and 50% dmg to the first wolf you have summoned(if multiple). The second part of the node would be giving that wolf double the bonuses if you have selected one or both of the solo companion passives within the passive beastmaster tree. Obviously the numbers can be adjusted by devs as needed but I just think it would be a really cool concept/option for solo companion wolf build.
If you want to go the extra mile, you can add a branch of nodes in wolf skill tree that can lead to that Alpha Wolf, through those nodes you can give bonuses based on maximum number of companions but only if you have those same passive solo companion nodes selected. Like having one companion, but at the same time being rewarded for pushing your max number trough other passives, skill nodes, or equipment. The two most suitable names for those nodes that I have come up with are “Alpha Wolf” or “Dire Wolf” since dire wolves are supposed to be larger and stronger.