Need Soloing Help
First, those "flat 10" chords are actually dominant 7 sharp nine chords; just a nomenclature difference. *The reason is tens are threes up an octave. *When you name a chord, say C7, the notes are: CEGBb; to add a b10 means inserting Eb into the chord. *Because E is already natural, the third, you must call the Eb by it's enharmonic name, D#, whenever possible. *In some cases, you'll end up with doubly- and triply flatted or sharped notes.
Your chords read:
Fm7 add 9
So you're doing a minor blues. *Jazz-blues' always have a dominant IV and V chord, the Bb7 and C7#9 respectively. *Basically, anything with an Eb major key signature will fit all notes in the scales dictated by the chords. *If you want to get a little funky, try an A- or a B-diminshed arpeggio or scale when moving to the Bb7.