I like Nature's Defender, in terms of stats/hp/mana/resist it's total is a bit less (46) than Fiery Defender.
ND gives +10 dex and helps you proc more so group tanking is easier.
Code:
name dmg delay ac str sta dex wis hp mana fire cold dis poi magic
Natures Defender 38 46 45 10 0 10 10 25 25 0 0 15 15 0
Fiery Defender 35 40 15 20 10 0 15 70 30 10 10 10 10 10
Comparing one vs the other
Natures Defender 3 6 30 -10 -10 10 -5 -45 -5 -10 -10 5 5 -10 -46
Fiery Defender -3 -6 -30 10 10 -10 5 45 5 10 10 -5 -5 10 46
damage/delay
Natures Defender 0.8260869565
Fiery Defender 0.875
sheet by baler