My 2 cents worth,
Only if destination WX is below minima, 2 suitable alternates (WX must be above ALTN minima) must be nominated and fuel to be carried for the alternate whcih requires more fuel.
The logic behind this is, in case you need to divert, should the WX at the destination is below LANDING minima, you can have an option to divide to 2 suitable alternates. Thus, this acts as a buffer should the first be not available for diversion.
Cheers