How bout this
Elf/fey barbarian sub levels at 1st, 5th, 7th
1st:Battle Fury
5th:crap, i forgot what I was gonna put there
7th:Fey DR
Battle Fury:+4 Str and +4 Dex that follow all the same rules as base rage.
Fey DR: Instead of DR 1/- at the relative levels, you instead gain DR 2/cold iron
it may look a little like the wildrunner prestige class and the goliath sub levels, however I think this would be a decent alternative considering this rage is a little more useful for dex based characters.
Elf/fey barbarian sub levels at 1st, 5th, 7th
1st:Battle Fury
5th:crap, i forgot what I was gonna put there
7th:Fey DR
Battle Fury:+4 Str and +4 Dex that follow all the same rules as base rage.
Fey DR: Instead of DR 1/- at the relative levels, you instead gain DR 2/cold iron
it may look a little like the wildrunner prestige class and the goliath sub levels, however I think this would be a decent alternative considering this rage is a little more useful for dex based characters.