I very much doubt it'd be realistic to create a higher output combination of bulbs for the 10X. The output with the MN31 and MN32 combination is already taxing the battery pack hard - the runtime isn't that long - I doubt it lasts convincingly into double-figure minutes.
I have two 10X's and enjoy the high output of this combination. The ability to recharge them mean I never push the runtime to the end of battery juice. From my perspective I understand the 10X to be a long runtime dutylight with a secondary, high output option. (not a high output light with a long runtime secondary beam)