Seriously though I'm not even getting into how we cooked the meal which probably led to them finding us, but at this point there's only one solution, take down that summoner.
I've done quests with Bear and I've helped take down worse but we have to coordinate and plan.
What about this scenario:
Joy just buffed Apathy to be disadvantage for INT rolls instead of death rolls which was specifically to make Alice actually feel the effect, so if I can get eye contact, and how convenient that I have a direct shot to him, I could get him boosted Apathetic. Now if only Yulya had that focus boosted to maximum, she could have drained it on him, I think regardless of the thorn vines, we still need to stop that guy or we'll be whittled down by his spells and summons like I did to Cat. If she has an INT ranged attack spell or ability that would be perfect.
We only need to hit him once to get rid of the thorns because it's a concentration spell, so regardless Yulya needs to attack him but we also know he has something that gives him protection against WIS based saving throws, so does Yulya have any boostable spell that doesn't rely on a WIS saving throw?
Also, before you all think my summons will help, he no doubt reset his wind wall, so don't waste your time with ranged attacks and it's not a sheepish spell and my summons are low HP so they'll suicide themselves just to attack him. The wind wall spell will cause damage before they can make the attack.
Does Yulya have Sacred Flame? That's a dexterity saving throw and it will boost 1d8 per level. For tier 2, casting it in a tier 2 slot, it will do 3d8 damage if he fails dex saving throw, so the hope is he doesn't also have high DEX.
I checked and Guiding Bolt wouldn't be affected by wind wall and it could have 5d6 damage when cast at tier 2, now you can boost that with the focus as is for 6d6 damage. Not enough to down him obviously. However, he also reset his AC boost so that'll fail because it requires passing his AC and he had a one time triggered shield for +5AC last time
I guess that's all we got, so probably Sacred Flame is the thing.
Then of course Cat goes into beast mode and disengages and goes for him, use claw so you break his shield and you should probably use any healing on Cat, sorry Alice, forget all the scrubs, get that guy, the others don't stand a chance against Cat's Rage.
[Joy the DM] Ashley has some good advice there, you should listen to her.