Ability Strength mods affect the damage of Rhino Charge and Rhino Stomp, the damage multiplier of Roar and the amount of health Iron Skin has. Additionally, Iron Skin’s health is also affected by armor mods and by absorbing enemy damage for the first few seconds after it is cast. Ability Range mods affect the range and impact radius of Rhino Charge, the radius of Roar and Rhino Stomp. Ability Duration mods affect the duration of Rhino Charge’s combo window, the duration of Roar and the stasis duration of Rhino Stomp.
So, all things considered, here are some builds you may want to try on your Rhino: