Boon Spellbreaker
A Minstrel's Spellbreaker that carries 
Winds of Disenchantment from the support slot — Hammer and Staff, 
Might for the squad, no damage.
Same elite as Power Spellbreaker, played from a stat line that survives standing where the bubble has to go. It is a boon-and-control build that happens to carry the strip.
Why these traits
The squad buff is Might, not power. 
Empower Allies pulses might to nearby allies while you are in combat, and 
Phalanx Strength passes on any might you give yourself; 
Mending Might heals you back for handing it out.
The healing comes off your burst: 
Marching Orders periodically gives you Soldier's Focus, hitting with a burst spends it to might allies, and 
Soldier's Comfort makes that same spend heal them and grant protection — so the Hammer burst is a support button here.
On the Spellbreaker line, 
Dispelling Force turns every disable into a boon strip and 
Enchantment Collapse spreads it to nearby foes, which is why the strip survives dropping the damage. 
No Escape adds immobilize to your stuns and dazes so the people you controlled are still there when the squad arrives, and 
Doubled Standards makes the boons pulsing off 
Banner of Tactics last longer.
Gear reasoning
Minstrel's and Giver's with concentration infusions. You are not trying to kill anyone; you are trying to still be standing in the middle of the bubble with your boons running long. 
Leadership is stats and boon duration all the way up.
Absorption steals boons when you interrupt a foe, and Hammer interrupts constantly — with Enchantment Collapse behind it, each of those thefts spreads. 
Nullification does the same on a flanking strike. Two 
Energy sigils turn every weapon swap into a dodge you did not have to earn. 
Mistburn gives you extra might whenever you might yourself, and Phalanx Strength hands that on to everyone standing near you.
When not to run it
It does not kill anything and it is not a dedicated healer. The healing is what Soldier's Comfort gives you between bursts, plus 
"To the Limit!", and that is it.
If the squad is losing people, that is the wrong problem to solve with this — take Heal Paragon. If boons and healing are already handled and you want the bubble on someone who also does damage, that is Power Spellbreaker.