Are 2 RCAF Chinooks enough for the Mali mission?

Melissa Kent, the CBC correspondent at the United Nations, has raised some interesting points in her article today about Canada’s contribution to the Mali mission.
Talks will take place today between UN and Canadian officials about the contribution.
Canada will supply two Chinook helicopters and four CH-146 Griffon helicopters to the UN mission to Mali. The UN, meanwhile, is expecting that two Chinooks will be available at any given time — which means Canada would