For number tweaking, multipliers work best. Fl4k already has over 150% damage buffs on their pets, but they have very few and low ways to multiply it. Most of the multipliers are for attack commands (Go For The Eyes and Sic Em’), which wouldn’t be an issue if attack commands weren’t clunky and unresponsive.
The terror anointment (+50% pet fire damage on attack command) is a decent damage buff, but it falls victim to the same issues. Pet damage is low out the gate, so multiplying it doesn’t get you much. It also depends on successfully landing attack commands, which hinders it’s effectiveness.
The fact that Fl4k’s pets can have, on average, +140% damage, a 15%-30% (barbaric yawp w/skag or scorcher) multiplier and STILL feel like they don’t contribute meaningful damage is a problem firmly rooted in their base damage. No amount of number fixing, even doubling frenzy, will make pets usable for damage if GB doesn’t double or triple their base damage.