Free betting tips: Ben Coley's AfrAsia Bank Mauritius Open preview

Heritage GC returns as host of the tri-sanctioned AfrAsia Bank Mauritius Open, where there are all sorts of storylines even in the absence of world-class talent as the golfing year creeps towards its conclusion.

For the Asian Tour regulars, there is the small matter of the Order of Merit and the same goes for members of the Sunshine Tour, for whom the Chase to the Investec Cup - yes, its real title - begins to hot up with €1million up for grabs here. There are European Tour players bidding to sneak a win while the stars aren't looking, including recent graduates from the Challenge Tour and Qualifying School, and there are invites who will feel the need to gobble up such an opportunity.

And then there's Louis Oosthuizen, by some distance the best player in this field and a knockout bet at the price.

Now 35, Oosthuizen might be halfway through one of the more peculiar modern careers. He won his major when not yet a world-class player, producing an outrageous front-running display at St Andrews seven years ago, but despite being a fixture of the world's top 25 hasn't added anything close to an elite title since.

The man from Mossel Bay has a couple of Africa Opens in the locker, he's won the Volvo Golf Champions twice, too, and he's covered most corners of the globe with victories in Perth and Malaysia, to go with Scotland and Spain. But in the years that have passed since St Andrews 2010, he has made headlines not by winning but by coming close, losing a play-off for the Masters and another for what would've been a second Claret Jug.

How do you assess that? Given the way he swings the club, it's easy to label Oosthuizen one of the sport's great underachievers, until you remember that the list of players who never did win a major includes the likes of Colin Montgomerie and Lee Westwood, and that with a better break here or there, Oosthuizen might have more of them than Rory McIlroy.

All of which is to say that Oosthuizen is difficult to get a handle on, but there are two circumstances under which he always has to be considered. The first is majors: he has a win and four seconds in 37 starts, and anyone who dared to follow him from the first to the last is already guaranteed a profit. The second is when he's by far and away the class act in a field, and we don't even have dwell on how much he really wants to win.

Here in Mauritius, he's one of just two players from the top 100 in the Official World Golf Rankings set to tee off and need only produce something close to his best golf, as he did when eighth in much stronger company last time, to take all the beating.

While Dylan Frittelli and Dean Burmester both hold obvious claims, they will have to dust themselves down having spurned opportunities for top-level breakthrough in Dubai two weeks ago and the former has been to Hong Kong since, where he seemed to empty after working his way into contention in the second round. This will be his fifth start in succession, whereas Oosthuizen has been resting up since the Nedbank, which was his first start in eight weeks anyway.

George Coetzee is of course a threat having won the title here two years ago, but he had very little to beat that week and has gone off the boil slightly since an impressive return to action. In fact, the way Coetzee managed to win this without being at his best, as the highest-ranked player in the field, only serves to strengthen the case for Oosthuizen. Runner-up was Thorbjorn Olesen, who was returning from a three-month absence and had been in awful form when last seen, yet finished second despite golf he described as "not pretty". There was no depth and the best players took advantage.

While held at a different course last May, Jeunghun Wang entered the week as a proven winner who was fourth-highest in world ranking and second in Race To Dubai points and whether it's Oosthuizen, Coetzee, Burmester or someone close behind, I'll be somewhat surprised if the winner of this low-grade event isn't one of the best players in the field, in contrast to Fanling last week.

On a course which will hold no fears, where his power and comfort levels in the wind are both relevant, after being among the first to spray the champagne when Branden Grace won at Sun City, Oosthuizen will have no excuses. The last time he played a stroke play event as weak as this he won having been in command throughout the weekend, and at 8/1 there's no hesitation in backing a repeat. I'm surprised he's not at least a couple of points shorter. He wins events like this much more often than the price implies.

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There's an obvious French connection here in Mauritius which points to Clement Sordet, who is affiliated with Heritage GC and arrives in top form. This promising youngster first showed what he might be capable of when second among a clutch of world-class players in Thailand two years ago and has since taken his Challenge Tour haul to four, despite having played little more than 50 events as a professional.

He's respected after cutting through the pack on the back-nine for a top-10 finish in Hong Kong, while compatriot Matthieu Pavon bagged three top-20 finishes at the end of a fabulous rookie campaign on the European Tour and also comes into consideration at the same sort of price.

However, I'd rather take a chance on Gavin Green bouncing back after an unsurprisingly low-key effort last time.

Prior to finishing near last of those who made the cut at the unsuitable Fanling after a bright enough start, Green had cemented his place atop the Asian Tour's Order of Merit with seventh place in Manilla and 38th in the WGC-HSBC Champions, having won his first title at this level as recently as October.