You've probably read this before (and you probably don't want to hear it if your mind is set on a multi-tool), but I have found that carrying the few individual tools I need works out much better than lugging around a heavy multi-tool with a bunch of components that don't work well and/or aren't needed for my bike. The chain tool component of most multi-tools is usually not very good and nor are the tire levers. For me, having all those Allen wrenches attached to a fat handle makes them really hard to maneuver in tight spaces on the bike.

I carry a small chain tool, small Phillips and flat screwdrivers, a tire lever, and just the (loose) Allen wrenches I need.