Again, sorry for the very late reply.
I would requeen any "hot" colony with a queen from a known European
source colony. Apart from that, one should work "hot" colonies (and all
African bee colonies) very slowly and using copious amounts of smoke.
The latter is the most important. One must smoke African bee colonies
heavily. People who work with the bees in South America are able to
manage the bees because (1) they have bigger smokers, and (2) they smoke
the bees heavily. Some other tips would be to only put colonies on
single hive stands (to avoid making more than one colony mad when
working a colony), use white-faced veils (Af bees will cover a
dark-faced veil), and work the colonies slowly without much agitation
(no banging colonies around).
Hope this helps.