My take on it.
If I can't find the anchor line, I screwed up. If I can't make it back to the anchor line because I don't have enough gas, I really screwed up.
Beyond that,
If it is not a deco dive and there is no current, there is no real need for an ascent line - just surface and come back to the boat.
If it is a deco dive with no current, then shooting a bag with a wreck reel, safety reel or finger spool would work fine.
If there is a strong current and you are going to do a drifting deco anyway, a wreck reel is again fine.
If you are doing a deco dive with a strong current but the deco will be done above the wreck, then a strong upline (and a larger lift bag or smb) is important and a jersey reel would be the way to go.