Uh, no. That would not work.
In Grim Dawn, you have pet builds and you have non-pet builds. Pet builds focus on the pets completely, with skills to support their pets that do the killing. Non-pet builds focus on killing things themselves.
You also have pseudo-pet builds, which use the kinds of summons that say “scales with player attack bonuses.” Like the storm totem or wind devil. THOSE you can combine with other builds.
But proper pets like the briarthorn?
Nah. Would do nothing but weaken you, as you could have spent those points elsewhere.
If you want a pet build, you’d better look elsewhere. There should be tons of info on the forum, like Maya’s guide The Carnival - A Guide to Pets