Exp from back in the day iirc:
Naxx: cleared 10/25
Uld: cleared till keepers (no HMs, no alg; then ToC came out, lel)
ToC: cleared 10/25H (no HMs)
ICC: cleared 10/25, guild 2nd shadowmourne
Currently I raid on retail at a semi-hardcore level and clear until somewhere between half the Mythic bosses in a raid to just under CE. DF will still come first for me over Wrath classic.
Looking to raid on Fri-Sat anytime after midnight West Coast (3am+ for East Coast); won’t cause drama, don’t expect to get Shadowmourne first.