Howdy,
Love the idea/theme.
Hope I am not stating the obvious in the below, so please dont take offence if I am.
One thing I tend to over look, is equipment/wonderous items for companions/familiars. Check what slots they have and what you can get. A few decent items will transform them. Bear in mind when the party are dividing up items.. any spares can go to your companions. remember wonderous items resize to the creature, armour and weapons do not (so you would have to get armour made). With this in mind (you needing 3 times the equipment) are you/a party member able to craft items?
Team work feats all day long.. but you have this covered for sure.
If you are thinking of using Range attacks then I would think you need to look into precise shot feat. That is if you are using the lions to engage in melee while you range attack?
I never normally look into "Volatile Vaporizer" items as they are v expensive... but in you case since you are a party of 3 already? Sometimes in an adventure you get non standard or powerful potions/oils. Being able to multiply the effects by 3 might be worth it?
Trait wise, https://www.d20pfsrd.com/traits/magic-traits/guiding-spirit-magic/ is so handy in so many situations.
just some random thoughts.
