#1
On a Epi Les Paul

Drop D = ?

Drop C = ?

Drop B = ?

Drop A = ?
Gibson Les Paul Std double cut-away
Taylor K-14CE Koa back and front
Epiphone LP standard
Line 6 Flextone 150w
Kam 800w 15inch PA
Yamaha FG720S
Line 6 UXII tone port
Microkorg
#2
I played in Drop A for a little while and was using Ernie Ball Beefy Slinky. They would word for Drop B too. They would also work for C and D but just my be a little rough on the fingers. Nothing a man like myself couldn't handle though.
My Gear:
Gibson SG special (W/ S.D. Jazz(N) & JB (B))
Mesa-Boogie Solo Triple Rec. (with EL-34's)
Boss DD-6 Digital Delay
Boss TU-2 Chromatic tuner
(what else do i need)

Where i work:
www.beanstalkmusic.com
#3
with drop D you can use regular tens. with drop C i wouldn't go thinner than 0.11. preferably 012s. at least

for Drop B and A, the E-string should be AT LEAST 0.56! 0.59 is perfect for drop B (D'Addarios seven string set. ditch the thinner e-string)
Brigadier of the 7-string legion. 7>6

Fender Telecaster
Schecter Damien 7
Engl Fireball