I duo Limbus NW quite often. And randomly temenos tower as well.
Solo is a matter of luck on teleports. Because if you activate teleport on last mobs at first floors, then you cant clear.
Duoing can be way easier, but completing all floors+farming coins almost 100% depends on 2 person skills.
If possible should be able to kill Fafnir and Final Behemot. If you have time Pluto is really reALLy fast to kill, just mind that it has huge chances to resist your sleeps. Byt binds and gravity will be enough.
I hate solo, because of the high risk %.
Seeing whats been posted above, I want to suggest to prioritize merits on Elemental and Enfeebling, THEN potencies and even AM2. A failed sleep/bind/grav can kill you and make you waste time, a resisted nuke basically makes you waste mp.
Please please please don't use AM2. Rather wait recast and then nuke tier4 again. Really, it's a wasted of mp.
And please throw in trash your Af1 hats and jet seraweels, doesnt matter if you are race that lacks on mp. Nowadays Jet are same price of mahatma legs, and NQ Demon helm is equal to af1+1 hat and it's only 10kish worth.
I suggest/use those sets (im at work so i might have missed something)
Enfeebling (macc DOES help)
-Igqira tiara
-Igqira lappa
-oracle gloves
-af1+1 body
-enfeebling torque
-altruistic cape
-omega ring
-balhran ring
-goliard clogs
-loq. earring
Nuking
-demons +1
-elemental torque (if you have, prudence is better.)
-bugard strap +1
-phantom tathlum
-moldy + novio (morion or phantom +1 if you dont have novio)
-weskit (if you have, morri)
-morri hands (if you dont have, zenith/windy cobra hands/goliard are good also)
-tamas and sorc, (snowx 2 if you dont have both, snow+omega if you have low ele magic merits)
-Ixion cape (or gleeman's cape, if cant get any of them, Prism cape is ok)
-Sorcerer's belt (p.rope is ok)
-mahatma hpl (morri if you have, or nothing really)
-goliard clogs (or cobra or yigit)
I have other 93487438953 sets but i wont listen, basically those are the ones mostly used. But remember to build up a decent drk+ skill set, get a fast cast/haste stuff for stuns (such useful spell!) and, if you have, some converting gear to activate your sorc. AND A STONESKIN MACRO!! Get a stone gorget if you can!