I started a new playthrough on Skyrim with a Nightblade (assassin/mage) character, and I need some help with the perks.
Earlier, I had thought that my main focus would be on Sneak, One-Handed, Alteration and Illusion. However, when I actually saw the perks and spells I'd use, I saw some redundancy in them. For example, do I really need to get Shadow Warrior and Silence when I'm already using Invisibility and Muffle? Similarly, considering that I play mainly with Daggers and Swords, how far do I need to go in One-Handed? I read somewhere (maybe on TES wiki) that One-Handed perks don't affect daggers, so I might just get Assassin's Blade and then forget about it.
Also, do I need the perks in Light Armor (except maybe Wind Walker)? Because I'll be using Stoneflesh/Ebonyflesh/Dragonhide anyways. And even that is questionable — the only situation where I think I'd use them is if I get detected by a group of enemies or against dragons. Otherwise, if they can't see me, why should I care about my armor rating?
So yeah, all in all, I would really appreciate if someone could tell me if I should even use magic at all — initially, I thought of using magic in a defensive way, to increase my stealthiness with Invisibility and Muffle, and to get some protection in Dragonhide/etc. But all that is highly questionable. I could get the same results by going all the way in Sneak, and, as a bonus, not have to worry about magic and time limits. Alteration is a different story though — Dragonhide and even Detect Life/Telekinesis are decently useful.
In the end — exactly what combination of perks and spells should I use in a Nightblade character?
Best Answer
I played pretty much this character exactly, and I'll tell you my findings:
Magic
I'd instead suggest Conjuration and Illusion as your magic trees. Being able to summon a "distraction" Atronach goes a long way. You can stay hidden, throw an atronach out, and then take a few potshots while they're distracted. I didn't really take any perks from Conjuration, though, and on the Illusion tree I did just enough for silent casting. Most of the other perks in these two trees just aren't worth anything.
Stealth
From Sneak, I took it all, although I would regret Shadow Warrior except that it is buggy. Sometimes if you sneak/unsneak rapidly near an enemy, for a second they'll lose track of you, and you can get credit for a sneak attack hit if you time it just right. This can be useful in a melee.
I invested some points in Lockpicking, but there's really not that much challenge in the minigame once you get used to it. I mostly just spent points here to keep the minigame from annoying me overmuch.
Weapons
From Archery and 1-Handed, I'd suggest putting points into the initial "damage increase" perk, and not much else. Most of your damage will come from sneak attacks, but having high damage otherwise can be useful.
Archery is super useful in situations where there's nowhere to hide close enough to melee, or when an enemy is across a gap from you or so forth. Attacking from range also means there's less of a chance they'll find you if you don't kill in one shot.
In the 1-Handed tree, the damage increases do count for daggers (they're considered 1-handed) although I'm not sure they're applied before the sneak attack multiplier. Even if they aren't, it's still worth having the extra damage for those times when you just can't hide.
Armor
Take ranks in Light Armor - Unhindered and Wind Walker are both quite useful. In protracted dragon fights, having stamina for power attacks can be essential. Being able to move quickly in high-resistance armor is also a big boon.
Crafting
Smithing, Alchemy, and Enchanting are the backbone equipment-building skills you'll need to be successful. In Smithing, get all the way around the light armor tree to Dragon Armor, which you can then use to create Dragonscale armors. Meanwhile you can improve all of your armor/weapons as you go along.
From Alchemy, I suggest taking just the "Alchemist" ranks. There are other perks there, but by the time you're at 100 Alchemy, your potions will be so powerful and plentiful that you won't really need them. You can learn the ingredient effects on the internet, or via trial and error. Once you know them, you can create potions that have no negative effects relatively easily.
In Enchanting, I'd suggest taking the middle track all the way to Extra Effect. The rest of the perks aren't that interesting by comparison. Soul Siphon sounds cool, but you'll find that by and large Soul Gems are easy to fill, and the benefit it gives you is relatively minor.