Got primal COE today with int, damage, crit damage.
my current COE is ancient with crit,crit, area... is the primal an upgrade with grim scythe build... I feel like the answer is no.... or would I re roll the int for something and wear the primal?
Use something like d3planner to see what the stat changes would be, or fiddle with your paragons and do the same.
(start by subtracting enough int, chd, etc to effectively simulate the items. Use that as your base and then change your ring and adjust the paragons to simulate the changes in stats.) this won’t work for all stats, but might give you a decent feeling for the effective change.