This is pretty straight forward, but for the Bruiser Champions, I think an item with AD as well as armor would be quite nice instead of having to buy two separate items. Yes, I do understand that this item would not have much armor or much AD, but it is nice to have for the Champions that do not really need Black Cleaver. :P
poor Atma's forgotten and alone
Problem is, there are already THREE damage-amp armor items available, and, as mentioned, one that grants armor and AD (atmas)
Understand that, for tank stats, the first step is "the big one". You get a TON of returns out of that first armor or MR item, but armor in particular as aas are so much of early trades.
Adding a high value early game armor/AD item would allow bruisers to get both their power spikes at once rather than having to pick either the tanky spike (Sunfire) or the damage spike (Hydra). Where one goves a lane bully early game and the other a juggernaut early midgame teamfight, armor+AD would give both and would have to be tuned into weakness like Maw is.
Well, Old Lightbringer 
did an excellent job of filling this niche. Too bad Riot destroyed it in favor of New Lightbringer.
Because ricklessabandon was bored, I guess. (<--- same reason for the pointless changes to Muramana. 
)
Atmas. So strong, people forget its there
Well, Atma's does give a good amount of armor, but it gives crit chance (15%) which is not too bad if a top laner was building other Items with crit chance; however, for the people that do not want to build crit chance, a new item (or lightbringer coming back to SR) would be great.
Atma's fulfills this perfectly fine, as most bruisers build health so that Atma's will have some health to scale off of. If an item is created with both AD and armor, EVERY adc will rush it.
