Dark / Psi
Rad/Sonic is probably the most damaging Defender combo (ST wise) available and a fantastic soloer (including AVs and GMs).
Dark/Psi will be an excellent team toon, with a very controllerish feeling. You'll have tools (stuns, sleeps, holds, -rech, -tohit, -res, -regen, +fear, +heal, awesome pet, etc) to handle almost every possible scenario.
I'd stick with Dark/Psi if you think you'll be teaming a lot. Rad/Son, as I said, will be a faster soloer but also able to bring a lot of benefits to any team.
You really can't go wrong with either of those.
@False Fiction - Virtue / Defiant
Current projects - [Glaciologist - Ill/Cold Troller] [Cloudshaper - Storm/Dark Def] [Harald Wartooth - Elec/Psi Domi]
Dark/psi used to be very popular in the early issues. The controller aspects and the big AoE attacks are popular.
Triumphant Defenders Forever
Psylenz FF/Psi, ArticQuark Storm/Rad, Symon BarSisyphus Bots/psn, Max VanSydow Thugs/Dk, Cyclone Symon Bots/stm, Blue Loki Ice/Cd, Widow 46526
HelinCarnate:OMG it is so terrible. I have the option to take 3 more powers but no additional slots. Boo F'ing hoo.
Don't use popularity as an indication of how good a defender is.
Remember, there's only one super-popular defender build, and not because it's necessarily a good one.
Dark/Psi synergy: teensy bit of stun stacking. Crazy -recharge debuff stacking. Fear + big single target blasts. Bit of damage from fluffy to help against psi immunes. Tar Patch keeps things within Psionic Tornado's radius. Psychic Scream too, while you're at it.
Overall it's one of the better Dark Miasma pairings, comparable to Dark/Sonic.
As a debuff based build with two OK AoE attacks, try setting your missions to -1 level and at least 2 hero equivalents once you pick up Psychic Scream (level 10, preferably). This will allow you to shut down your enemies' ToHit with Darkest Night, and to get more fear duration from Fearsome Stare. Gradually increase the hero equivalents as you get better enhancements. Temporarily bump the level up to 0, +1, or higher, if on a team running your mission.
Mine dark/psi is level 49 and she is good both solo and in team. Didn't have any trouble leveling her. That is mine 2nd favorite defender closely following traps/rad.
"If you want to win you must not lose."
"Easiest way to turn defeat into a victory is to put on the enemy's uniform"
"Better strategic retreat than dishonorable defeat"
How viable is a Dark/Psi Defender???, I am struggling to decide what new toon to level lol.
Defenders:
Rad/Sonic
Dark/Psi
Troller:
Ice/Therm
Ice / Cold
Plant/Therm
Advise anyone? my dark/psi is lvl 21.