Which ACT score should I send?

I am applying to Duke ED and am unsure of which ACT scores I should use or if I should send both.

Dec 16
C:31
M: 32
R: 29
S: 29
W: 6
ELA: 26
STEM: 31

April 17
C: 33
E: 35
M: 30
R: 35
S: 33
W: 8
ELA: 31
STEM: 32

All my scores increased except my math score which decreased from a 32 to a 30. My superscored composite would be a 34 but will it work against me by sending the Dec scores.

Duke’s website says that, “Duke will consider the highest composite score and highest scores on each section, regardless of test date, but will not recalculate the composite score.”

What makes the most sense?
Thanks

Send both.