Yup. Greater Bull rush may be enough. But with the Bull Spirit Animal you might be able to slide two of the enemies into a Prismatic Wall for free.in most of these cases, the “free action”, given by “Greater Bullrush”, is enough – in my experience.
I've just tested it. You can do this without the feat Mobility.if I had given Jorad the feat “Mobility”, so he could “move”, “push”, “move”, “push”, … (I’m not totally sure, if you need “Mobility” for this – if the “pushes” are “free actions” - but I think so)
Perhaps it is worth trying this in my next run... on the other hand “Mobility” costs two feats…
Perhaps somebody else can test this for me?
Best regards