Tanek spends his actions getting down from Regideus and taking cover behind him.
Regideus will full attack the mob in front of him with two slams for 40 and 32, damage 59 and 61
. If both hit he gets a rend from his locking hands for 54 extra damage
, assuming mobs are subject to rend damage (since the strength of a mob is its tight formation, I could see how ripping into that formation (probably with a body in each hand) could do the equivalent of rend damage.)
If he takes out the mob with the first shot he'll target the raider who hit him with the second.
Then, if that raider is still alive (or didn't get attacked), he will use his shoving arm to make a free action touch attack of 28
in order to make a bull rush attempt of 52
Tank will attack the raider in front of him, using his Push ability to bull rush if he hits. If he successfully pushes his target, he will then use a move action to earth glide straight down 5ft.