you have two slurs or phrases (depending on how you look at it). whenever you have these, you have more freedom to lift your hand and replace it quickly (leaving the last note a sort of staccato and ending to the first group of legato notes or phrase).
how about 531, 53, 42, 31, 42,31 and then 521, 42, 31, 42, 31, 42, 31, 42?
there is also an implication of the top note being held through on both phrases - so in that respect you'd try to hold the top note whilst playing the notes underneath. this would significantly change the fingering.
531, 53,42,31,21,21 and 521 and then try to get everything in with fingers that are not 5 (namely 21) and 31, 42 on the b/g and c/a.
*the reason i say implication is that it could have easily been written as an sixteenth chord or eighth chord connected to two sixteenths - and no more. but the line is extended across the length of the notes connected. this implies a connection of line though not directly. sort of a melodious connection and louder voicing brought to the upper notes.