What are your favorite linkups that allow you to get in lots of
Flatiron pitches?

I'll mention the Keel to the Devil's Wings ... as a lesser known one that requires little hiking in between.

The Keel to Devil's Wings is on my TODO list. How is it? Which wing?

Similar: Regency, Royal Arch, first two tiers of the Fourth, Challenger, top of Green Mountain.

A favorite of mine, with no pretense of originality, is East Face of the Third, Freeway, and Baker's Way to North Ridge of the First.

More or less on the border of what I can do in a day are the five numbered flatirons, and the Top Ten Easy Climbs In A Day from Haas's guidebook. Both were wonderful. I'm too slow for Roach's top ten in a day.

Keel is ok, mostly just the funnest approach to the Devil's Wings, which is spectacular rock.

After Keel, the North Wing is right there ... 700 ft, 5.3 I think.