premium and mission pass

i was wondering if i should buy premium or wait till the new missioon pass arrives. im not sure how it works tho , if i buy it now will it only take effect in the current mission pass , or whats left of the time for it? or will it last as long as my premium time? what is the best strat for purchasing premium/pass

The Premium Set Bundle comes with two items: Premium Set Ticket and Mission Pass Gold Ticket. You do not have to use them at the same time.

In addition, each set also gives as many gold passes as there are 30 days. IE: 60 day set = 2 passes. 90 Set gives 3 passes.

Keep in mind, you should only use one mission pass gold ticket per season. Don't attempt to use a second one.