Light Twin (Part 23) S/E Performance
As previous posts point out performance is marginal even on a good day.
Approach flap is all you should use for circling & landing (or better still flapless if appropriate) which puts you in a better position for the go-around if you must (John-T's advice is my prefered option)
Don't fall for the "full flap when a landing is assured" line.
Every pilot who wound up inverted on the threshold ( and there have been many) did just that.
The best rule I have heard on the matter is -
" Under the prevailing conditions of Weight/Altitude/Temperature
know how well the acft will perform - if it is marginal make sure you walk away from the wreck"