not sure how vMA is different from solo PvE?

I typically go with a build that is self sufficient at the cost of some dps. I'll still be pulling 30k+ on bosses but I'll make sure I have sustain built in as well as self heals. I'd likely play something much more focused in an organized group or trial situation. If I'm playing progression vet content, I'd probably also be playing it a bit safer as well as a means to see more of the mechanics. As I (and the group) get more comfortable with the content, I remove some of the safety nets and go heavier on dps.

fake tank role

Vicious Ophedian/ Tzogvin/ briarheart/ mechanical acuity / war machine

Sharpened weapon front bar, use a separate set of weapons with front and back weapon glyphs flipped around since I don't bother using poisons in 4 player dungeons. More AOE slotted like maelstrom bow, acid spray for the archer or brawler with a master 2H for the melee build.

For four years I have always assumed running an AOE setup in 4 player dungeons was the best option, even if it does 5-15% less single target damage than my 40-50k pure single target builds. Building for AOE tends to lift AOE DPS around 50% over a single target build (I play NB mostly), which I tested on multiple dummies after housing came to ESO. All those years other people kept saying it was a bad idea because AOE builds weren't showing up in any trial build guide. Now I feel better about it since ESO logs pretty much proved the theory. There really is no need to be mudding your way through a dungeon while spending 2/3 of the combat time fighting trash mobs. There really is no harm shaving off minutes from a dungeon you've finished countless times by adapting a different build.