Armor for Military and Contest

The recent event (and is still on-going as I write this) gives a complete Green Knight set for a quest, and then a complete Blue Knight set for another.
But how do those sets compare to what you get in Arena?

Regular set (Black)
These adds to armor, and when the set is completed, you get a set bonus of STR, DEF and HP.

Regular set (Green)
These adds to ONE attribute (STR/DEF/AGI/DEX), the armor value is higher than black sets.

Regular set (Blue)
These adds to TWO attributes, the amount added is more than that in green, and the armor value is yet higher.

Regular set (Purple)
These adds to TWO attributes, the amount added is more than blue, and the armor value is higher than blue.

Arena (Blue)
These add to ONE attribute, the amount added is in the same range as the regular blue set. The armor value is the same as the regular blue set. It also adds to 2 separate Arena stats, but it does not give a set bonus.

The preference is in this order for items of the same level :
1. Regular (Purple)
2. Regular (Blue)
3. Arena (Blue)
4. Regular (Green)
5. Regular (Black)

But how do we compare gears of different level?
If a hero is equipped with a Blue Fury set, does he give it up for the Tiger arena set at level 50?

The way to compare it is to equip the set, and look at the hero's stats.
If the hero is equipped with only non-arena items, the War and Contest stats should be identical.
Each point in STR/AGI/DEX will add to 3 points in stats, while a point in DEF will add to 4 points in stats. For Blue arena items, if the attribute added is 'X', the arena stats added will be 3 times X if the stats are DMG/EVD/Crit, but 4 times X if the stat is AMR. But these only affects contest stats, not military. That is why when you equip arena items, your military stats will be lower than contest stats. And as such, each item has a different value, for military and contest. For sets that has a bonus, the bonus value needs to be amortized across the 5 items.

Military Value = [Total attributes]*4 + Armor
Contest Value = [Total attributes]*4 + Armor + AMR(if any) + (DMG/EVD/Crit)/3*4
Bonus Value = [Total bonus attributes]/5*4

So if you are equipping a complete regular blue set, the military value will be military value + bonus value. However, HP bonus affects contest much more linearly than in military. So the contest value will be contest value + bonus value + HP value. That HP value is harder to measure, since that will depend on the hero's base HP. But I'll put it at about 20%.

I'll use 20%, and give a summary of how the items stack up to each other. It also assumes complete set with set bonus.
You may want to do your own Math with the formula above, especially if you have sets of mixed colors, or using a mix of regular and arena items.

Gear	Color/Type	Level	Military Value	Arena Value
Fury	Blue	45-49	399	479
Shark	Blue/arena	45-49	278	434
Guard	Black	50	216	259
Guard	Green	50	318	381
Guard	Blue	50	460	552
Tiger	Blue/arena	50	320	500
Knight	Green	55-59	361	433
Knight	Blue	55-59	520	624
Knight	Purple	55-59	678	814
Leopard	Blue/arena	55-59	362	566
Zealot	Green	60-64	399	479
Zealot	Blue	60-64	580	696
Zealot	Purple	60-64	753	904
Lion	Blue/arena	60-64	404	632
Marsoon	Blue/arena	65-69	446	698
Lionheart	Purple	70	892	1071
Mammoth	Blue/arena	70	488	764
Brutish	Blue/arena	75	530	830