Added to
Homebrews.
I used the woolly mammoth's size and weight as placeholders.
We still need natural armor. Here are the other elephantlike creatures' modifiers:
Woolly Mammoth +10
Grizzly Mastodon +8
Mastodon +8
Elephant +7
I'm inclined to go with +8 to +9, since they were probably less shaggy and fatty than the cold-dwelling mammoths.
For feats, it gets 4:
Woolly Mammoth: Alertness, Endurance, Improved Bull Rush, Multiattack, Power Attack
Grizzly Mastodon: Alertness, Endurance, Bull Rush, Power Attack, Toughness (2)
Mastodon: Alertness, Endurance, Improved Natural Attack (gore), Improved Natural Attack (slam), Iron Will, Toughness
Elephant: Alertness, Endurance, Iron Will, Skill Focus (Listen)