Would definitely recommend you wait until 730 days are completed, unless you have an urgent need to travel.
If you have 490 days now, you are missing 240 days. 240 days from now is Nov 29th, 2024. So you are not far off from when your PR card expires, even if you only get to Canada in 2 weeks and then leave for another two weeks. This assumes that none of the days earned will fall out of the rolling 5 year window, of course.
I think this is a much better approach than relying on credit for traveling with your citizen spouse. Apart from the risks involved of not getting the days outside of Canada credited, as pointed out by
@Ponga, almost certainly it would lead to longer processing times as opposed to a "standard" application.
On a side note: when were you last in Canada, and when did you land? It seems likely to me that you are already in breach of the residency obligation, so be aware that every time you return to Canada, you could be reported for not meeting your RO, which could lead to loss of status. If you can, return to Canada at the earliest opportunity and stay here until you meet the residency obligation.