best advice i can give is pick an element group. probably material. stack your weapon with at least 2 slots of offense (1) put in flat damage rend/poison gems. depending if you are ailment, ferocity, or agility it might affect your tree, focus on gear that gives your main stat and one of your damage multipliers. (material damage %, crit damage%, you should probably use 2 steel rings, also always try yo get flat material damage on your accessories.

hope this helps, also never use dual daggers, 1 dagger and shield if you must. or just use a 2 hander since your skills can stay the same.

I really enjoy slayer's fury for single target, but it is overshadowed by bleeding edge. You may consider switching to BE, or at least using it for clear speed. If you are set on going dual daggers instead of dagger/shield, I would probably start stacking dodge. Try to stay away from passives that reduce your dodge chance. Also, I would personally drop the headhunter charges node, as 5s is a stupid short time, and you have to kill the hard stuff to get the points, but its the hard things you need the dmg for. It's just not efficient, unless they were to increase the time to say... a minute? 30seconds? Either way.

If I were to put together a dual dagger build, I would maybe try something like this https://wolcen-universe.com/builds/gMBN2y-dual-dagger-(55-passives)

Im not sure how squishy it will be, but you should be trying to stack as much all-res as you can (Especially important on chest and helm). But being squishy is something you'll have to deal with if being melee without a shield. You MAY even consider focusing ele dmg instead of material, and using the BE passive that turns it into fire. Then stack fire AND frost, take the passive that consumes burn stacks to increase dmg, and hope that frost can keep mobs CC'ed for survivability. Otherwise, if survivability is your issue, switch to dagger/shield.

Oh, also, try to put as many stat points into 1 stat as you can. If you really want dmg, stack ferocity. You get .5% dmg per point for main stat, and only .4% for secondary stat. That's a difference of 20%. You can just try to make up for the other stats using gear. Also, make sure you have sockets on all your gear, and put flat dmg gems in your weapons. For chest/legs/helm, I personally stack block chance/efficiency, but you can do dodge, all res, whatever you need. For rings, I went with attacks crit chance froooom alexandrite..? (support 1).

As far as finding weapon upgrades, I feel you. Every weapon I get is garbage, and rerolling is terrible. Until they fix the consumption of gems to target stats anyways. Good luck in trying to make the build work.

I had a lvl 60 rogue offline and I was having a very easy (and fun) time with him before the game decided to delete it.

The build I was making was very versatile and had very good damage, mobility, fast clear speeds and good survivability provided you paid attention and were quick on your feet. I am making it again on online now with a few changes, because it was so much fun.

I put most of my points in ferocity for high crit chance, I took as many passives as I could for crit chance and crit damage from soldier, assassin and alastor trees, I took Merciless Lethality from asssassin tree to double crit damage, attack speed on crit from Alastor tree, rage generation from child of fury and warmonger trees, attack speed and dodge from sentinel, assassin and alastor trees, material/physical/melee damage and life leech from warmonger.

Skills are as follows:
Slayer's Flurry:
XXXX
OOXO
OOOX
OOOX

Phantom Blades:
XXXO
OOOO
XOOX
XOXO

Evasion:
OOXO
OOOX
OXOO
OOOX

Sovereing Shout:
OOXO
OOXO
XOXX
XOOO

Mark of Impurity:
OXOX
OOXO
XOOO
OOXX

Most of the kills come from blades and evasion. With high crit chance (practically 100%) and crit damage (9-15k) the blades would instantly and satisfyingly mow down lines of trash mobs as they tried to reach me. Always try to position yourself with movement, rolls and slayer's flurry in such a way the the enemies will be well lined up before the throw. I took the perk to leave a damaging trail on the ground. The damage from the trail ALSO crits high, so it finishes off any beefier survivors and other trash mobs that the blade missed as they cross the trail trying to reach you (2 or 3 ticks), so it doubles as a zoning tool.

This may sound weird but I used evasion OFFENSIVELY. I would flurry into clusters of mobs then immediately bounce back with evasion. Because of the high crit damage, it would blow everything up. I took the perk to replace the slow effect with a damaging aoe which, like the blade, also crits very high and will usually kill trash mobs that the explosion missed in one tick. And the lingering aoe also stacks with the one from the blade (for big enemies). You can use this to block off corners and choke points and just sit back and watch mobs walking into the meat grinder.

I took the perk to get an extra projectile for evasion, so the area is pretty big AND there is a small intersection in the middle of the two explosions. Any poor bastard caught there (the one you flurried into) takes damage from both explosions and takes two dots (if they stay there or is big enough to step on both pools). All that while weakened by mark of impurity and being hit by the blade and trail you pre-emptively threw before flurrying in. Special enemies become quickly broken and you can use shout and chop them down with flurry while they're being hit by a buch of critting dots on the floor.

Get plenty of cooldown reduction so you can flurry/evasion into groups of enemies often. You can bounce back to safety with evasion, or you can continue flurrying into their backlines, turn around, evasion, and leave the pool for them to kill themselves as they try to follow you. Throw blades at the ones that are going around the goo.

Basically, do lots of aoes damage, herd the survivors into the pools and trails of death, mop up survivors with flurry. Play as a safe zoner or as an aggressive pinball machine. Wither down tough enemies with zoning and finish them off with shout, mark and flurry. That's the gist of the build.

Try this Build.

https://www.youtube.com/watch?v=8dHelBgZChc

Huh, I might actually try that frost assassin build. Thanks Korhak!