Here’s my Condition build which has been serving me very well in sPVP and free tourneys.
Mostly it’s the common things in many similar Staff / Scepter & Dagger builds, because they simply work, so I’ll focus on the more uncommon things I enjoy to round it up as a solid solo and team fighter with good defence and couple tricks up the sleeve.
Curses and Death Magic traits are the bread and butter for the chosen weapon set; maximise your Bleeds, Corruption utilities and Marks. I’d consider 30 in Curses and 10 in Death Magic, for Greater Marks, a must leaving you with 30 points to customize.
Sigil, Rune and Accessory choises are the usual optimised set for survivability, longer lasting bleeds and getting the most out of Sigil of Earth and Barbed Precision trait. Rabid Amulet is simply the best, it has everything you need, don’t leave home without it.
The utility skill selection is also very common: Consume Conditions is very powerful, Epidemic is the cornerstone of the condition build making you extremely dangerous in group situations and Corrupt Boon is for melting boon stacking builds (often otherwise hard to kill bunkers).
Spectral Walk and the Flesh Golem are the more uncommon choises. The Walk gives you mobility on call as well as a great trick for losing opponents (while your conditions eat on them). Flesh Golem is a good all-rounder, nice cc and damage for solo fights and can also tackle a whole team in group fights if aligned correctly.
Plague could be better group utility for a coordinated team but I find it lacking in Hot joins and random Free trounaments as you don’t do that much damage yourself and rather just disrupt the opponents, leaving the dirty job to your teammates who might or might not be up to the task.
The rest of my traits I spent in picking up Staff Mastery from Death Magic for simple utility and Last Gasp & Decaying Swarm from Soul Reaping to give you good defensive tools when you need them as well as a solid source of Life Force. The Decaying Swarm might seem weak on paper but in reality it’s a snare and switfness exactly when you need them.
As for the common traits I didn’t pick:
The rest of the Mark related traits are rather weak, Spiteful Marks does pitiful damage as it’s only 10% on top of the already small initial trigger damage of the marks. Soul Marks on the other hand, while potentially decent in aoe situations but weak in single target, is just not needed due to the Spectral Armor and Spectral Walk giving Life Force.
Mark of Evasion is nice but only causes 2 bleeds and is not really needed on top of your weapon skills, besides you should rather hang back at range and not be dodging around in the melee.
Reaper’s Might is good but it’s for shooting away Power dependent Life Blasts, which is not worthwile as the damage in this build is lacking.
The Death Shroud entry traits are powerful but in my opinion only worth it in a power build that keeps popping in and out of Shroud all the time. With Condition Necro I find myself using the Shroud mostly for stunbreak, burst damage dump and quick fear, no benefit for hanging around in it.
And the common utilities I didn’t pick:
Power for Blood is just not needed, it’s additional damage but your weaponskills already are quite powerful enough as they are. Also while the Epidemic and Corrupt Boon are more or less mandatory I rather spend the last slot for an escape option.
Plague Signet is another which is simply not needed, off hand dagger #4 and Staff #4 handle the job quite well as they are.
Signet of Spite is all in all rather lacking, a bit of damage and a snare on a rather lengthy cooldown, not worth it.
Wells are powerful but not required in this build as you already have a lot of aoe effects already.