For movement intensive fights, I use the thumb joystick on my G13 to strafe left or right / go forward/ go back on my team (example fight Ick in PoS). If everyone needs to move I just hit follow (Devourer in FoS). If its just the tank that needs to move I either eat the damage or move with keys and mouse. I have gotten pretty acurate with the thumb stick. On my undergeared melee team I just use follow and IWT.