Are pets builds follow same path as non-pets? You choose one element that your pets deal, focus on RR to that element in your skills and devotions and that’s it. Any other damage from your pets is worthless. And then you buff pets and your defenses on remaining points.
RR is needed no matter which builds u are making of… retal, pet, self-bound… in very rare cases - hybrids.
In your case (pet-focused, not player-scaled pets), you buff pet damage by adding a bunch of “Bonus to All Pets” stuff and try to also put a huge defense on yourself to not die cuz once you die, your pets go with you, so…
But pets doing specific damage only (set in theirs skills). If you pet is doing Vitality Damage, you should take Vitality RR, otherwise this Vitaliy Damage is pretty much useless no matter how many %dmg your pets have.
If you have a standard pet salad then you will have some pets doing vitality, some acid, some lightning, some fire, and then you have a topping of flat chaos, elemental and acid damage buffs you might stop recognizing individual ingredients as the taste would average itself across the dish.