If Atma's gave armor that scaled with (bonus?) HP we'd have back our offensive armor item while making it not valuable for ADCs. If it gave critical chance instead (doubled on melee) it'd favor bruisers who tend to invest in critical damage (runes, lategame IE)
67chrome2 votesMoving Atma's stats around won't fix anything. The main problem with Atma's is the end-game scaling/stat conversion the item has.
An average game only sees ~11k gold per player, which is 3 major 3k items. If Atma's feels solid as a 1st major item, it's going to be really strong once you have 3 major items. If Atma's only feels solid as a 3rd major item, it's going to feel to late-game to remember and everyone will forget it's there.
Also, with a typical fighter you spike mid-game when you get decent bases from some levels and you can force 1v1 fights because everyone isn't in a 5v5 formation 24/7.
Not to mention - once you have 2 major items the novelty of getting offense and defense on the same item has worn off. You can swap between full offense and full defense items at that point. Where split offense/defense items are really useful is in-lane when you want to counter-build your lane opponent, or build up some bulk without completely sacrificing damage.
As a HP scaling conversion, Atma's can just never do these things in a balanced fashion. HP grows to 400% of what it starts at on level 1. Armor and MR don't even half damage taken from bases for the equivalent of a 200%, AD scales to almost exactly 200%.
HP just grows way to fast throughout a game for any HP scaling conversion to feel useful at all early while being balanced late. Especially now when we have a %max HP boosting item.
Photos of Ghosts1 votesWhat if instead it scaled off armor? Or pre-item HP?
67chrome1 votesArmor would be less bad than HP, but not by much.
Pre-item HP is base HP, but if you're going off of base stats: offering gains based off of champion level would probably be a better idea, as base stats are generally pretty close, with no real reason to reward/punish the outliers.
Either way you still make it seem like an end-game item by having any scaling stat conversion at all. Everyone will read that as needing something else to back it up first, where the main advantage of hybridized stat items is early game as a first major purchase. The secondary strength of such items is largely allowing some degree of flexibility in a kit when you could do with a smattering.
Which, again, comes back to the end-game scaling/stat conversion the item has as a major problem.
Photos of Ghosts1 votesPre-item HP would include runes, masteries and passives. And hybrid offensive-defensive items are also useful lategame when you're still not tanky enough but your damage outputs pitiful.
LilxPaprika1 votesposted this for atmas brainstorming on reddit: https://www.reddit.com/r/leagueoflegends/comments/3ewge4/reddit_redesigns_atmas_impaler/
was also thinking it'd be cool if it had 25% attack speed. somthing like this: ionic atmas
http://apollo-na-uploads.s3.amazonaws.com/1436456734/ionicatmas.png
except something else instead of aoe lightning... since we already have 
maybe bleed on single targets.
I think all you need to make it not valuable for adcs is to have it get a stat that is melee only. say for example it gave more stats per surrounding enemy within a certain range. this range would be larger for melee champs.
