This way you lock in some profilt safely, and still the potential to catach the next wave.
Since 730 is around ATM (most likely), it has more leverage if price goes up further.
Never ever sell the 710 leg while keep the 760 short leg. It is too risky to have naked short leg.
I have a 720-740-755 butterfly, probally will do the same. :)
just my 2c. not investment advice.