Ok, so i decided to do some tests with  rogue tank.  
  
Hearth Orlean, base stats at level 12 
  
http://i.imgur.com/ysLKisw.jpg 
  
Every rogue here is missing (they were done in tavern and i was too lazy to add every talent): 
  
Galvain's Boon - +1 Mig 
Blooded Hunter - +1 Slash and Pierce DR 
Song of the Heavens - +1 Per, +2 Shock DR 
Dungeon Delver - + 0,1 Crit Damage multiplier (it's not gonna be visible anyway) 
Gift from the Machine - +1 Mig, 1,05 Max End multiplier 
  
Mob Justice - +5 Acc 
OR 
The Merciless Hand - +0.3 Crit Damage multiplier (it's not gonna be visible anyway) 
OR 
Second Skin - +2 DR 
  
Equipement (best stuff i had before jumping into Breith Eaman, if you have something better please post): 
  
Dandy Hat of the Diseased Yak - +2 Res, -1 Int 
Lilith's Shawl - +3 Per 
Sanguine Plate - +2 Dex, Superb  
Rabbit Fur Gloves - +0,1 Crit Damage multiplier (it's not gonna be visible anyway) (Spirit Spiral - 1,05 Melee Damage multiplier are another option, on Oidreacht only +1 max damage) 
Ring of Deflection - +10 Deflection 
Pensiavi Mes Rei - +3 Mig 
Boots of Stability (vs push/prone, idk if Bile Stompers are not better with +5 Corrode DR) 
Gridle of Eotun Constitution - +3 Con 
  
Draining Weapons (i add Corrosive when possible on my weapons): 
  
Tidefall (Great Sword) - Superb, Corrosive 
  
Purgatory (Sabre) - Superb, Corrosive + Little Savior - Superb (+25 Def and no Acc loss) 
  
Oidhreacht (Stiletto) - Superb, Corrosive + Little Savior - Superb (+25 Def and no Acc loss) 
  
Edge of Reason (Battle Axe) - Superb, Corrosive + Little Savior - Superb (+25 Def and no Acc loss) 
  
  
Edge of Reason and Oidhreacht still have 2 enchant points (can take any Slaying Enchant except Kith). I didn't test The Rose of Salthollow (Superb, Corrosive) because imo there is no point in using it if you have Tidefall.  
  
Stats with eq and talents/skills (all modals ON, no other buffs): 
  
Tidefall 
http://i.imgur.com/iDaEFOJ.jpg 
  
Purgatory + Little Savior 
http://i.imgur.com/QE2QZJw.jpg 
  
Oidhreacht + Little Savior 
http://i.imgur.com/ilP70Tz.jpg 
  
Edge of Reason + Little Savior 
http://i.imgur.com/nqwmaZm.jpg 
  
  
For testing i did solo runs in Breith Eaman (last place with mobs for me, clearing Defiance Bay was way too easy): 
  
1) Tidefall - Low Deflection and verry slow attacks. Way too low dex imo. 
2) Purgatory + Little Savior - amazing, with buffs from the rest of the party - invincible. 
3) Oidhreacht + Little Savior - Endurance gain is low but with proper buffs it cant be pretty solid. Slaying enchant available. 
4) Edge of reason + Little Savior - almost the same as with Purgatory (with lower damage). Slaying enchant available. 
  
Imo, rogue tank could be fun to play with. Focus on damaging talents at start, switch to tanking mode after Riposte. Getting the proper gear might take some time (Ruffian is the best option here, Oidhreacht drops on the first level in Od Nua, switch to Purgatory after that). I could switch few damaging talents for more Deflection but we have warrior tanks for that. 
Moon Godlike is another option (+1 dex and int are useless, healing is not that great too).