I'm struggling with some of the harder bosses in the grove and having my bum handed to me when I try the temple. What could I do better?

My current set up
Ponder: Shadow tank
Stamped: Fire attacker
Iris messenger: Light Healer

I'm going to be honest I'm a bit bamboozled that you apparently got past the Worm with this team? Given that they're two +0 wild-caught+a starter stats-wise, not even rank 3 in their most progressed attacks, aren't lv75 (and thus no access to their lv75 moves), and have unupgraded vinethorn gear. If this is the team you used, I think you might be the person with the weakest overall pets (in terms of all those factors combined) to have gotten past it? (Though that's based off of what I remember from our Woerm beating teams thread, not current data)

1. better gear. You probably want to upgrade to stoneweave at minimum. Base stoneweave goes cheap, relatively speaking, these days

2. just general ranking of moves. If you can cope with the base enemies in the temple, grinding rank exp there will make it a bit faster, since enemies there give more than those outside the temple

3. shadow's not really considered the best tank element for the temple, given its lack of team-defending/ defence increasing moves- most people run water or earth tanks in the temple. I can't put any personal statement on using them in there, though, since I don't use shadow at all

4. I have no idea what state your barracks buildings are in, and those are a notable factor

5. knowing the various boss strategies is useful. I don't know which bosses specifically are causing an issue for you though