I can only offer my personal experience.
I did kambo on 2 consecutive days prior to my flood.
Day 1
Did a double session of kambo (had kambo applied to several burns, after purging had stopped, laid down to rest for 20 mins, then redid kambo on the same burns, purge, rest again)
Day 2 - same as above
Day 3 - started flood dose late afternoon
Were it not for concerns about the health of my heart, I think my provider would have given me kambo the morning of the flood.
I have had amazing results with sub flood doses of RB in conjunction with kambo. There is also a thread about microdosing iboga and doing kambo
http://kambo.me/smf/index.php?topic=26.msg80#msg80