I already had an ongoing run with the party I described while writing that post.
I went with Shards of Woedica because it's cheap and quickly available, but also because of the club modal - whatever the Fanatic hits gets Will debuffed to ensure afflictions go through and the healing from afflictions is sustained. Also, increasing single target damage via the bonus helps with the self-healing by hitting afflicted. I haven't actually taken Lay on Hands, or any other heals. Using Watchful Presence from the Priest is plenty, though for most fights the Fanatic doesn't even reach Bloodied because of the self-healing. For the tougher fights so far, the self-healing is enough to sustain more than long enough for the Priest to cast Triumph of the Crusaders or Watchful Presence, because the fire Godlike AC bonus also triggers at that point. In case of emergency, the Fanatic is also wearing the Eothasian amulet thingy that gives a heal on near death.
Funnily enough, I put the Unbroken/Trickster in a leather armor because he wasn't pulling much aggro even when running into the fray upfront and before the Fanatic, but mobs still tend to congregate on the Fanatic with the Unbroken in Leather Armor...
I picked Stalker/Beguiler as a way to have a melee/ranged/caster char who can run to the front, off to the side, shoot from the back, or cast away CCs and afflictions as needed. Hybrid is the keyword for this fellow.
Went Stalker for the tankiness as I wanted a hybrid who could do both melee and ranged - I don't actually need the AC to do anything on the battlefield, so he just sticks with the Stalker if he's hanging back and shooting / casting away.
Went Beguiler for the better party synergy. Deceptions > Shreds for putting out afflictions ASAP and consistently. As he's half Ranger, this char does plenty of single target damage already without Soul Annihilation. Because of the affliction focus of the party, he's always generating a ton of focus, and as an accurate Ranger, he gets the full soul whip bonus on pretty hard hitting attacks (attacking sneak attack vulnerable is never a problem). Also, Soul Blade would come at the cost of Max Focus and starting focus.
Overall, this char fits super well into that role. With the pet, he's tanky enough to go do some flanking, or intercept anything headed to the backline. With the ranger + Beguiler soulwhip, he constantly generates focus. Usual set-up is Eyestrike, Marked Prey, Normal Attack, then more CC / afflictions depending on what's needed. I'll definitely try that Stalker's Patience / Magistrate's Cudgle combo. He's outfitted with the Spine of Thicket Green for now, I haven't been able to find info on whether the +beast enchant on it works for beast tagged abilities from the Ranger. Not sure if that's been tested already.