Fighter vs. Barbarian
Fighter
Fighter Attack Bonus: 21/16
Damage: 24,5/22 with crits: 29,4/26,4
HP: 124,5 (using the method of our group. Full Hp on lvl 1 and min half the HitDice on further lvls)
AC: 25
Barbarian (with rage and using the „unexpected strike“ power)
Attack Bonus: 20/20/15
Damage: 22,5/19/19 with crits 27/22,8/22,8
HP: 131,75 (temporary HP from rage included)
AC: 16
Fighter hits Barbarian:
1.Attack: 95%HitChance x 27 = 25,65 Dmg
2.Attack: 95%HitChance x 24 = 22,8 Dmg
That makes a total Dmg of 48,45 per round.
131,75HP / 48,45 Dmg = 2,72 rounds until the Barbarian has 0HP
Barbarian hits fighter:
1.Attack: 80%HitChance x 27 = 21,6 Dmg
2.Attack: 80%HitChance x 22,8 = 18,24 Dmg
3.Attack: 55%HitChance x 22,8 = 12,54 Dmg
That makes a total Dmg of 52,38 per round.
124,5HP / 52,38 Dmg = 2,38 rounds until the fighter has 0HP
So as we can see the barbarian is slightly stronger than the fighter but only for the 4 rounds he can maintain his rage (with the unexpected strike).
Fighter vs. Ranger
Fighter
Fighter Attack Bonus: 21/16
Damage: 24,5/22 with crits: 29,4/26,4
HP: 124,5 (using the method of our group. Full Hp on lvl 1 and min half the HitDice on further lvls)
AC: 25
Ranger
Attack Bonus: 21/21/16/16 (two weapon penalty and +6 Favored enemy included)
Damage: 15,5/15,15/15,5/15,5 (+6 Favored Enemy)
HP: 101.5
AC: 24 (with cats grace)
Fighter hits Ranger:
3.Attack: 90%HitChance x 29,4 = 26,46 Dmg
4.Attack: 65%HitChance x 26,4 = 17,16 Dmg
That makes a total Dmg of 43,62 per round.
101,5HP / 43,62 Dmg = 2,33 rounds until the Ranger has 0HP
Ranger hits fighter:
1.Attack: 85%HitChance x 15,5 = 13,175 Dmg
2.Attack: 85%HitChance x 15,5 = 13,175 Dmg
3.Attack: 60%HitChance x 15,5 = 9,3 Dmg
4.Attack: 60%HitChance x 15,5 = 9,3 Dmg
That makes a total Dmg of 44,95 per round.
124,5HP / 44,95 Dmg = 2,77 rounds until the fighter has 0HP
So we can see that the Fighter is much stronger than the Ranger. And this is with the +6 Favored Enemy Bonus!!! Oh and the animal companion wouldn`t help at all. He would be death after one single strike and would have a 5% chance of hitting....