I have 100 smithing in skill and have the dragon armour perk but the game doesnt let me purchase daedric armor. There is a line connecting dragon to daedric so Im assuming I havent done anything wrong.

The prerequisite perk for Daedric is Ebony. You can't go in a circle from the Light Armor side and get Daedric, you have to go the Heavy Armor route.

You've got to be kidding me. I didnt know that, now I gotta waste 3 skill points on perks I dont need.

Stick to glass weapons and dragonplate armor. It's 99,8% as good as daedric.

Even leather can be 100% as good as dragon or daedric with smithing and fortify-smithing gear and potions, though it's easier to get to the 567 cap (80% damage reduction at 667, and you get a +100-point hidden bonus armor spread across the 4 pieces) with elven or steel, because of the specific perks. There are 15 levels of legendary status, FYI.

I didn't know this either, though it doesn't surprise me! I'm currently on 98 Smithing and had gone the Light Armour route, hoping to go Dragon then Daedric, but I level-up so slowly these days I doubt I'll ever make it. Hey ho, one for my next character maybe.

I did too, with my Altmer. I'm at 98 smithing now too, but the last time I improved my armor I was at like 95. Elven and glass perks + gauntlets of eminent smithing (+20%) + necklace of extreme smithing (+22%) + ring of peerless smithing (+25%) + blacksmith elixir (+50%) + perk for all light armor + perk for matching set + 94 light-armor skill = 1098 glass armor rating. My elven set is somewhere in the high 800s, and I haven't improved it for a while. No need. No known enemies have the capability for attacks that ignore armor. The cap is all that you'll ever be able to take advantage of in the vanilla game. Just make sure you get there without a shield equipped, since it comes off when you whip out a bow or 2H melee weapon.

Edit: Note that I haven't even touched the enchanting or alchemy trees. This is all doable with smithing perks, light-armor perks and items you find along your Skyrim travels.

My character doesn't even have a perked smithing tree and I can hit the armor cap if I want to.

I wear fur bracers, Savior's hide, stormcloak officers helmet and forsworn boots. I have 5/5 agile defender and custom fit, various smithing items I've found (resulting in around +80% smithing) and a blacksmiths elixir. I'd rather do it this way so I don't have to wear the glass/elven/scaled armor exclusively, which look terrible, I can use any armor I want at high levels. Without perking alchemy, enchanting or smithing (I do have the steel and arcane smithing perks though).

I am level 60 ish though, I relied on skill to survive through the early levels, took me ages to get this high in level, now I need the protection against deathlord archers and briarhearts which hit like a truck on master ha.

If you don't want to use glass, you can always use skyforge weapons. I have done this with two of my characters save the perks

The skyforge weapons are very good.

Nevermind. sorry