Talk:Randuin's Omen/@comment-36002403-20180709150228/@comment-25489490-20180729232047

There are two possibilities. Either 1. Randuin's reduction cannot effect true damage. Or 2. Randuin's can effect the converted true damage, or it calculates before the conversion happens(both of which will give the same exact result, order of operations).

I'm going to assume situation 2. here.

Right Now_ Math correction: It's 20% d.reduction. 100 x 0.8 = 80. True damage: 80 x 0.15 = 12

Randuins right now will make a 50 ad critical hit against IE user (with no armor calc) deal... 80 damage, the 15% from infinity edge is a conversion not a bonus.

Before_ "new IE patch" math you did correctly.

So, in the end, before armor is calculated the new IE deals only 80 damage compared to the old 100. However, IE is not in a vaccuum and also increases crit chance more than it did in its previous version (assuming the user understands the passive). The ignoring armor part is only 15%, which comes out to 30% of your total ad (leaving 170% ad remainign as normal crit damage) in true damage unless it is a stormrazor(reduced/modified) crit.

Right Now Damage Calc Against a 200 armor target with a Randuin's Omen, the new IE without a Last Whisper item will deal this much damage:

Crit = 200% ad -> 160% ad(randuin's) -> 136% ad physical + 24% ad true damage.

Physical Damage Reduction = 100 / (100+200 armor) = 1/3rd of damage is received. 136% x 1/3rd = 45.333.. %AD.

(%45.33 ad Physical Damage) + (24% ad True Damage)

Final Damage = 67.33% ad damage dealt to health bar.

Old IE would just be 250%(0.8) = 200 / 3(armor) = 66.66% ad.

TL;DR: Not really any different with new IE except for: the fact that new IE gives you more crit chance once you have completed any 30%+ crit item, is quite weaker against low armor targets than the old one, and shreds over 250 armor target MUCH better.