Cool--I'll have to try Ahtanum and Eureka sometime soon.
Ahtanum, in my experience, is like a floral version of Cascade. I got no more grapefruit than Cascade, no pine, but lots of floral notes.
I did a 1# brew with it a while back. I used millennium for bitters, and lots of late additions and whirlpool.
Note, that was 2013 crop used in 2016, iirc. I'm sure there is some variation, but I don't see how the floral aspect could dissipate. Maybe if used early in the boil, it would impart more pine.
For pine, simcoe, boiled longer(20-30m), same with centennial. Ctz for bittering and flavor can do it.
Maybe something like
Ctz bitter
Ctz +simcoe at 25
Simcoe+citra+Mosaic at 15
Citra +mosaic at 5
Citra at 0/wp
Possibly sub nugget for simcoe
I've heard ultra late in the boil can be piney
It's cheap too