Sorry, but CRA states specifically in the guide for Saskatchewan Tax Credits;
"You cannot claim this credit if anyone made a claim for the child as an eligible dependant on
line 5816
or as a spouse or common-law partner on
line 5812"
.
If your ex-spouse is making the claim for the Eligible Dependant Amount for this child, you cannot make the claim for the Amount for Dependant Children.
https://www.canada.ca/en/revenue-agency/services/forms-publications/tax-packages-years/general-incom...
