ouch . . . I presume you know that's during the cyclone season (nov - april).
The 'normal' route
to South Africa
island, Cocos keeling, Rodrigues, mauritius, reunion, madagascar
, durban (or port richard). But the Rodrigues to Madagascar
is right thru the main cyclone belt. Normally you aim to arrive Durban about Nov 1st to avoid the cyclones.
An alternative would be to stay north as long as possible . . . maldives
, mozambique channel. This would loop you not totally above but at least around the edge of the highest frequency cyclone areas . . . BUT it takes you thru the active pirate zone. I would not recommend it because of that.