So in my quest to build an effective cavalier with a griffon mount, I found the monstrous mount feat. Originally that was going to be my solution to getting a griffon mount and bring this character to life, but that I found out that even with that feat, Griffons get stunted BAB and HD, and I need an extra feat to fly on it, AND its flight speed gets cut in half.
Then I discovered the Monstrous Companion feat, and since my GM actually allows Leadership at the table, I'm weighing it as an option, but it has left me with a few questions.
First, does a flying creature always flay at half speed with a rider, or is that purely a feature of a flying creature gained via the Monstrous Mount feat?
Second, on the Monstrous Companion feat page it states that even at effective druid level of 20, the strongest monster companion you can get is level 12, despite some entries on the list of monster companions having as high of a level as 17 (the same level a cohort can achieve when their leader is max rank). Are the Leadership score modifiers listed on the Leadership feat page supposed to affect your effective druid level despite it not explicitly saying so? That's the only way it would make sense to me.
Finally, what is the earliest I could even get a Griffon companion? On the Leadership page it says a cohort must be no higher than your character level -2. A griffon has a base effective cohort level of 8, despite it only being a CR 4/5 HD creature. Does this mean I would need to be at least level 10 to even have one? That seems......incorrect, considering by level 10 a griffon with base stats could easily be killed in a single round by any CR-appropriate encounter.