Is how many abreast can they travel up the path? two? one? 5? I dunno?
But currently I'm all for my Illusiory plan, flirt's all for combat, but we should probably line the sides of the cliff, pepper them with as much projectiles as possible (remember I can dimension hop Boulders down the hill without a saving throw

and Loda and I both have bulls' strength on) and she's got flaming spheres to control while rolling them up and down the path.
Alyssia can lightning bolt large streams of people and Stoneskin the frontline fighters, and in the event of overwhelming odds (which may eventually come) the plan for Thondrek at least is to drop a Fireball and either go invisible or tele-hop away for a spell lol
But yes providing the path leading to where we are is not super wide that is likely the best place to keep the fight.
(Loda doesn't have an entangle and the clearing allows for swarming as was pointed out)