I played it myself on Master and didn't have many issues. Like I said in the build make sure you fury people and carefully block/bash/stagger to avoid being hit. Also make sure you're stealthing and getting the jump on people!

With light armoured characters you should always prioritize combative skills(one handed, light armour) over supportive skills(block, illusion) 53 in one hand isn't that bad for level 18 so I don't know what you're talking about but I'd suggest heavy grinding in smithing(try crafting jewelry instead of spamming iron daggers) in order to boost both your defence and offence and try to stay away from using enchanted gear/ weapons until you get the arcane smithing perk. Other than that keep in mind this character depends heavily on stealth and has no way of healing besides using what potions you find lying around or using a weapon with an absorb health enchantment. Finally you can always just down grade to expert difficulty until you get to level 20( that's what ponty does).

Sometimes, I don't think I did on this guy though. Dual cast fury = easymode

Once again Ponty you've made another impressive build. +1

The main issue is in tombs fighting Draugr Deathlords and such. You can't sneak to fight them a lot of the time, and, at my level, Fury won't work on them.  I guess I'll have to play safer slow down when in fights. Be more tactical.  Other than the "boss" fights and such, it's a fun build!

Could always grab a follower if you're having trouble

I like this build alot! The only thing I'm thinking might be trouble is dragons. How do you suggest fighting them? Dragonrend shout?

Here's a trick I use when playing a character without a ranged weapon; go invisible. The dragon will almost always land a few moments later and begin searching for you, which allows for a sneak attack. Hope that helps!

Wait for it to land and hit it until it dies.