Try flashing CWM (non-touch) or PhilZ recovery, they might work for you... they use the Vol and Power buttons to perform recovery functions. It is simple to install or switch even if the screen is not working, you can do it through fastboot with a single command...
fastboot flash recovery cwmrecoveryimage.img
of course, substitute the actual recovery image file name.
EDIT: Nevermind... I didn't see you were using MultiROM until it was too late, I should probably read more thoroughly before replying.
Current Personal Phone: Google Nexus 4 on Cricket/Aio (Beanstalk
4.4.4 with hells-Core Kernel
Current Work Phone: LG G2 VS980 on VZW (Official Beanstalk
Current Tablet: iPad 4 and Samsung Galaxy Note Pro 12.2
Other phones "in the family": HTC DNA, HTC One (M7), Motorola Moto G GPE
Previous/Retired Android Devices: HTC Aria, HTC Incredible 2, HTC Rezound, Samsung Stratosphere, Samsung Galaxy S2 Skyrocket, Nextbook 8P