Daedric has a pre-req of Ebony. It looks like a circle, but it's not. Poor interface design on their part. You have to go up the entire Heavy Armor tree.
Cheshyr, I think you are missing what Whisk3yjack is getting at. Your post presumes that he is under the impression that he can go up the Light Armor side of the smithing tree and simply add Daedric at the end, i.e. Steel, Elven, Advanced, Glass, Dragon, then Daedric, which, as you say is not possible.
What he is suggesting is going up the Heavy Armor side of the smithing tree, as per usual, and then adding Dragon at the end, i.e. Steel, Dwarven, Orcish, Ebony, Daedric, then Dragon. This is possible. Not only that, it may end up being optimal.
Going up the heavy armor side of the smithing tree with the end goal of producing Dragonscale light armor, has numerous potential advantages.1. Your armor weight is minimal while still allowing you approach (or exceed; I'm not sure how the Dragonscale math works out) the 567 armor rating (or something like that) 80% damage reduction cap.
Some numbers (all given at base values for four pieces without shield):
Orcish
57 Weight
90 Armor rating
Wolf
32 Weight
72 Armor rating
Dragonscale Light Armor
20 Weight
82 Armor rating
The Dragonscale offers a MUCH better armor to weight ratio than any heavy armor option.
I'll leave it to someone else to do the Alchemy +130% maxed smithing, 100 Skill in Light armor math, but going this way may make it possible to approach the magic 567 or whatever armor rating while adding only minimal weight. I'd be curious to know what armor rating one can reach by going this route with NO PERKS in light armor (but 100 skill). Is it possible to hit the cap this way? If not, how many perks would have to be dropped on agile defender to hit the cap?
2. If you can hit the armor cap this way, or get close enough, this allows you to take advantage of the light armor perk tree, which to my mind is much more efficient than the heavy armor tree.
Let’s compare:
Right side of the tree:
Point 1 (or 1 – 5):
Juggernaut is roughly equivalent to Agile Defender = Tie
Point 2
Custom Fit = Well Fitted = Tie
Point 3 (or 3 & 4 for Heavy Armor)
Light Armor = Matching Set
Heavy Armor = Tower of Strength THEN Matching Set (Point 4). From what I’ve read, the efficacy of Tower of Strength seems questionable. If this is true, then this is somewhat of a wasted point trying to get to Matching Set, while Light Armor has no such inefficient point.
Last Tier
Light Armor = Deft Movement
Heavy Armor = Reflect Blows
It may be that neither is necessary and I personally probably wouldn’t invest a point in either, but if you were going to go this way, Deft Movement would appear to be the better of the two as Reflect Blows doesn’t reduce the damage to your character but rather duplicates the damage on the enemy. Since we are doing godly damage anyway, this doesn’t seem to be as effective as having 10% of all damage miss your character.
Left side of the tree
Tier 1
Light Armor = Unhindered
This could be good if you don’t want to use the Steed stone
Heavy Armor = Conditioning
Equivalent to Unhindered but more necessary (if you don’t want to employ the Steed Standing Stone) as the weight of Heavy Armor is so much more and the stamina drain when running is just tremendous.
The biggest difference here, however, is that you have to essentially waste two points on crap perks to get here. Fists of Steel seems mostly useless as is Cushioned. We can already strafe an almost vertical cliff face, how often is fall damage really a problem?
Tier 2
Heavy Armor = Fists of Steel and Cushioned = not much for two perk points.
Light Armor = Wind Walker
This seems pretty good, actually, and definitely represents a better use of four points (Agile Defender, Custom Fit, Unhindered, Wind Walker) than the Heavy Armor equivalent (Juggernaut [good], Fists of Steel [crap], Cushioned [crap], Conditioning [good, same as Unhindered]).
In conclusion to the Light Armor vs. Heavy Armor tree argument:
Heavy Armor = 11 Points (skipping Reflect Blows) = +150% armor bonuses (when wearing a matching set), armor wears nothing and won’t slow you down, plus the additional semi-crap bonus such as a reduced stagger which may or may not work, and the complete crap bonuses of Cushioned and Fists of Steel
Light Armor = 9 Points (skipping Deft Movement) = +150% armor bonuses (when wearing a matching set), armor wears nothing and won’t slow you down, AND you regenerate stamina 50% faster.
Light Armor is the clear winner. If you can hit the armor cap either way, Light armor affords you the opportunity to skip the Steed Stone AND regenerate stamina 50% faster with no wasted, [censored] perk points spent.
If you can hit the armor cap without any points great. I would like to know but am unwilling to wrap my head around the math now or ever.
Or, I wonder what armor rating would we be at if we put one point in Agile Defender and one point Custom Fit (are these wasted if we want unhindered and Wind Walker?).
3. With Heavy Armor, the steed stone or wasting two crap perk points on the way to Conditioning is practically necessary. Your stamina drains super fast while running around with a full heavy armor set. I’m always popping out of it whenever I can then switching back when I get in a fight. With light armor, this effect is not nearly as pronounced. Sure you could ride a horse or torch glitch your way around, but I HATE walking and light armor makes it necessary to not have to walk nearly as much.
4. Light armor is more versatile if you want to have multiple sets.
Though it is true that there are various ways to make the armor that you have equipped weight nothing (Steed Stone, Conditioning, Unhindered), the extra armor you carry around still counts against your burden, which can be a problem if you like to sport multiple situational armor pieces.
Light Armor frees you to have a spare Magic casting set and it doesn’t cost near as much to lug around as it would with heavy armor. You can have a spare set of non set breaking boots that drop the fortify archery damage and add carry weight and it only takes 3 pounds (for Dragonscale) instead of the 10 pounds for Daedric. And so on.
5. For one extra point in smithing (but two points less in armor perks, assuming you want Conditioning / Unhindered), you get the best of both worlds: The best Daedric weaponry and maxed or nearly maxed armor plus you get 50% faster stamina regeneration and more flexibility with spare situational pieces.
Downsides:
Before you have a chance to craft a Dragonscale set, the early game would be much more difficult as you would be restricted to unimproved Leathers, Steel, or found armor. If you use Heavy armor during this time, you won’t have trained your light armor skill at all before you make the eventual switch to light Dragonscale.