For the second boss, what character do you drive with? Maybe if you drove from the healer you could use that char to stomp on the ticks before they spawn? I've only done it in normal so it might have more in mythic. I know he spawns a fair bit of them when he charges at the wall.

Only other thing I can think of is if you set up a macro for a conga line during the charge (drive from the tank, 1st slave follows the tank, 2nd follows the 1st, 3rd follows the 2nd, etc), swing round to face the boss then all strafe.

_____________________________ <-- wall
^^^^
{BOSS}

Toon A ----> strafe this way --->
Toon B --->>
Toon C --->>
Toon D --->>
Toon E --->>