Ferocity is attack x 3.2 + Health.
Raj’s Ferocity at Level 10 is 2875. I don’t know what it is at level 1, but I think it is about 2/3 of Level 10, which means it will be around 1900F.
Your top dino is 933F.
PvE events are based on your top 3 dino’s Ferocity.
Leave Raj at level 1. You may need Raj to complete a lot of your events going forward. So, you’ll fight, wait out the cool down and fight with Raj again.
I had similar problems when I got a Dimetrodon and my son leveled it to 10.
It wasn’t nearly as bad as what you’ll have, but I pretty much used him for everything. His cool down was 52minutes.
Raj at level 1 will be at least 3 or 4 hours.
You may want to start grinding PvP modded for some of the other high end dinos if you struggle to help balance things out.
Worst case, sell Raj for the DNA if it makes the game too hard.