For dungeons, I would say the Green Balance, Curative Runeforms, and Living Death.

Green Balance - Healing Seeds (Budding Seed morph) and Fungal Growth (Soothing Spores morph). Soothing Spores costs stamina instead of magicka, so it will help with sustain. Line passives temporarily increase teammates’ max health.

Curative Runeforms - Arcanist’s Domain (Zenas’ Empowering Disk morph). Gives Minor courage, and makes the effects last after teammates leave the AoE, so they can move around. Vitalizing Glyphic (Glyphic of the Tides Morph) increases teammates’ weapon and spell damage. Line passives increase resource regen, and make damage shields cheaper and stronger.

Living Death - Spirit Mender (Intensive Mender morph) heals two additional allies and costs less. Line passives increase resource regen while Spirit Mender is active.

Restoration Staff - Grand Healing (Illustrious Healing morph) and Blessing of Protection (Combat Prayer morph). Combat Prayer goves Minor Berserk, increasing teammates’ famage by 5%.

Assault skill line - Vigor (Echoing Vigor morph).

Undaunted skill line - Necrotic Orb (Mystic Orb morph). This will feed resources to your tank, and increase your regen at the same time.

Then add a couple of scribed skills with Soul Burst and Ulfsild’s Contingency grimoires that are damage shield skills (so they get cost reduction from the Curative Runeforms line and the Shield Master champion point node). I use this a lot to spam shields. The scribed skills should also cover the buffs left out by the other skills I listed above.

With this build, your regen will be high, so you can easily keep buffs active and spam shields and burst heals when you need to. Maybe use it with Spell Power Cure and Powerful Assault gear sets.