The AH is now offline, so there's no way to check what crafting materials go for anymore. New ones are also Account bound, so you can't even trade them even if you wanted to.
It depends on what crafting material you are looking for. If you're looking for Subtle Essence and Fallen Tooth, your best bet is to farm as much gold as you can, and buy it from the auction house.
Currently, the crafting materials are selling for 20 and 45 gold, respectively. That is drastically cheaper than buying shop items, or even farming them yourself.
Source: this answer.
So, the answer fluctuates. In the event that the crafting material cost on the auction house rises above the cost of buying an equivalent magical item you can salvage, buy it from shops. In either case, gold find helps you.
For magic find, it will also depend on how long it takes you to find and gather magical items. The time investment will fall somewhere between the other two scenarios. It will take less time to find items you can salvage than it would to gather 1000 gold, but quite a bit longer than to gather just 25 or 100 gold.
The only time you want to really find magic items is when crafting material cost on the auction house goes above the cost of shop items. Which, at that point, becomes a stable economy for you on it's own. Buy magic items from shops, salvage, post crafting materials on auction house. Repeat. Use extra gold to buy items to salvage materials for yourself.
So, short answer, from least to most time investment, using Subtle Essence as an example:
- If: Crafting materials are dirt cheap (Costs less than you would get from selling magical items): Sell magic items and buy from auction house.
- If: Crafting materials are more expensive (more than selling your magic items) and less expensive than buying items from shops for salvage:
- If: Gathering requisite gold will take longer than finding magical items: Find magical items.
- Else Gather gold and buy from auction house.
- If: Crafting materials are more expense than buying magical items from shops: Buy items from shops, salvage materials, post on auction house for profit until price drops below viability.
Credit to LessPop_MoreFizz for the original information and inspiration.
They are random drops in the game world just like other items. I seem to have found them dropping more frequently as the game wears on.
If you want one earlier, I suggest hitting the auction house. There are plenty available for very cheap.
The relics are just another way to increase the stats on your followers. It works just like an item slot that only the followers have access to.
Another thing you should know about equipping followers is that they receiver a 2.5x multiplier to any of the base stats (STR, VIT, INT, DEX), so it is advantageous to seek out gear for them that maximizes that.
Best Answer
Nope. The armor of your follower and damage reduction is just waaaaay too low to tank anything in inferno. Since there's no way to outfit him with armor other than a shield and what few mods you can get on jewelry, its simply not feasible. Your best bet is to give him as much +vit and magic find gear(at least you get 20% of the mf benefit) as possible and just have him soak up damage and distract enemies with his stun.