Mu has very effective ways to dump meter due to the existence of YnK and Omo. Omo is your primary damage super, with average damage normally and tied highest unconditional damage in Overdrive. If you have 100 meter, YnK into Omo does absurd damage (2468 minimum damage in OD).
The routes in the corner are pretty trivial. If you're doing a combo that uses corner ender C, you can (OD) (YnK) Omo instead of SOD after 3C. Otherwise, if you're doing a route that ends in 214D -> Corner Ender, you can replace the ender with 2D 6C 6D 6B (YnK) Omo.
If you want to spend overdrive for the 214D -> ender routes, you can also regain 4 steins to maximize the damage it does with 2D 6D 6C ODC 66 5D 6B2 5D (YnK) Omo. This route is height dependent, if they're too low the 2D 6D 6C ODC part will leave them too low to continue the combo with 66 5D 6B. You can increase height by doing j.4D in corner middle A route, but this is only possible if you are doing that route. Corner middle B should leave them high enough already.
Active flow YnK EA does more minimum damage than AF Omo, but this is a moderately uncommon situation as it requires 79% or lower health, not having 100 meter, and active flow simultaneously.