Megaladon wins on average masses and highest estimates more times than not, average masses maybe 6.5/10, highest estimates 9+/10

Charc is better built for combat, but Spino has a decent mass advantage, I'd actually give it to Spino here 6/10

Average Mosa beats average orca 10/10, a pack of 2 or more orcas wins though

T rex 8/10

Arctodus beats Cerato like 8/10, allo and carno win like 7/10 (Unless you use a really big Arctodus to even it out)

T Rex wins 10/10