Amaterasu Conquest Solo/Support

In answering some of your questions more directly...

Technically, you can never get TOO much defense. There's no cap you're ever going to realistically hit at this point.

However, the more protections you get, often the less additional protections are going to do for you.



There are things you can do to maximize your tankiness, outside of directly getting physical and magical protections.

• Increase your health. Health straight up plays a role in how much damaqe you can take before dying. That's probably very obvious, but it's important to remember. When building tanky, you don't want to just get protections...don't just go Breastplate of Valor, Shogun's Kusari, and Spirit Robe or whatever. Get items that also have health. The combination of protections and health is termed effective health, or eHP. Look at topic 1.2 in The Word of Thoth.
  
  
• Add mitigations. % Mitigation is like protections, but separate. It works in a linear fashion, and its damage reduction is calculated BEFORE protections are considered. It is also the only way to counter true damage, which happens from some abilities (e.g. Bakasura's Butcher Blades) and also when enemies build enough pen items and you don't build any protections from items.
  
  Your options for % mitigation are Oni Hunter's Garb (up to 9%, based on how many enemy gods are nearby) and Spirit Robe (temporary 15% for 3 seconds when hit by hard CC). Both are situational in how/when they give you mitigations, but both are often worth it.
  
  
• Remember that enemy pen/protection reduction affects your protections. So getting more protections will obviously help. You still have to beware of enemies getting strong pen (e.g. Titan's Bane, The Executioner, Obsidian Shard, Demonic Grip), and this is why combining health, protections, and mitigations are the best idea.

Understand that most Guardians and Warriors have generally good base damage, but often somewhat poor scaling (this isn't the case all the time, but fits in general). This means building power isn't always going to do all that much for you, unless you dedicate enough of your build to both power AND pen. And that takes away from your tankiness. Unlike mages, assassins, or hunters, you can deal somewhat reasonable damage WITHOUT building full glass cannon.

So then, if you're looking to help with your damage output, your typical "best" direction is to include bruiser items in your build...things with offensive AND defensive potential. Items that fall in that category include:

• Stone Cutting Sword (though this is more of an Assassin item, usually wouldn't suggest for Ama)
• Ancile (also probably wouldn't suggest for Ama, though the CDR is nice)
• Shogun's Kusari (doesn't have power, but does increase attack speed, and Ama has some decent basic attack function)
• Void Shield (this is a great bruiser item, as it provides power, health, phys protection, and protection reduction...that protection reduction of 20 is like having an item with 20 pen, but also helps other physical teammates deal more damage)
• Masamune (this is okay maybe...nice power, and situational protections, plus some added speed)
• Witchblade (Like Shogun's, provides some attack speed and CDR, but also has health, and counters enemy basic attackers by slowing their AS)

Hope this info helps.

Kriega, Gary, and Bran will have better information, but basically you want to counter-build your lane opponent during the laning phase and then pick up whatever the support doesn't. Depending upon how your support builds, you may need to be the main tank or you can build into more bruiser items like Brawler's Beat Stick if nedeed. Here's a list of what the SPL pros are building in their ranked (non-SPL) matches. Basically you want to mix and match health, protections, and utility as the match dictates.