A. 90sec AMRAP @sustainable efforts:
-300m row
-with remaining time, AMRAP db thrusters (challenging)
*rest/walk 90sec
B.  90sec AMRAP:
-15 russian kb swings (Heavy)  
-30 single unders
*rest/walk 90sec
C. repeat A
*rest/walk 90sec
D. repeat B
*rest/walk 90sec
E. repeat A
*rest/walk 90sec
F. repeat B

*rest/walk 5min, repeat
A,B,C,D,E