So, this is what I got from comparing the two:
Base: 968 hp(without anything equipped)
HP after focus: 1317(roughly 1.36x hp increased from 1317/968)
Amount of HP increased : 349
Intensity (only intensity amulet equipped):
Base HP: 968
Number of intensity: 43
HP after focus: 1445(roughly 1.49x hp increased from 1445/968(0.003x increased per 1 intensity) )
Amount of HP increased: 477
Defense (only defense amulet equipped):
Base HP: 1299
Number of defense stat: 331
HP after focus: 1767(roughly 1.83x hp increased from 1767/968) or (roughly 1.36x hp increased from 1767/1299)
Amount of HP increased: 468 (799 hp increased from 968)
968 - 477 = 491 hp increased difference
Conclusion:
Iron leg focus ability 1.36x from the base hp. However, intensity add the multiplier up.
In the end, defense is more beneficial than intensity from using focus.
HOWEVER…As your lvl increases, the multiplier would be increasingly important…this means that in the future, intensity would be more valuable when using focus than defense
let me break it down for you:
imagine in the future you would have a base hp of 5000.
18 intensity = 72 hp
now we calculate what would 18 intensity give you
18 x 0.003 = 0.054
5000 x 0.054 = 270 bonus hp
now we calculate the defense
75 x 1.36 = 102 bonus hp
You see how intensity at base hp of 5k would be double the efficiency of defense? That’s why in the near future after about 2nd awakening, intensity is more valuable than defense when using focus
The moment intensity is more valuable than defense is around 1900 base hp
– also, after I made this I realized a bit of a mistake…18 intensity = 72 defense(1:4 ratio)…wouldn’t rlly change much though(1 intensity is still 0.003x and base multiplier is still 1.36) –