Not sure what you mean by "long-lived" there, Douglock II (to distinguish him from the Douglock who was a reversible fusion of Doug and Warlock back in their New Mutant days) appeared for the first time in the Phalanx Covenant, and then went on to be a member of Excalibur for several years, and then as Warlock had his own (admittedly short lived) spinoff series as part of the M-Tech line.