First - you can PM me so this doesn't spoil anyone's true onsight.
I've never climbed the pitch, but have heard you need a bunch of the same size in the yellow or red alien range. I know it's different for climbing ability, but how many of each? 4 each? I'm not sure how much 5.10d there actually is, but this grade will be pushing it for me on lead.
Roughly speaking:
Yellow Alien = Yellow Metolious = .4 C4
Red Alien = Orange Metolious = .5 C4
Thanks for the info.