That is not what the ruling says. It says that in the case there was an hypothetical Ghulam Wildcard, you won’t be able to link her into the Link when there is already 4 Ghulams in the link. But both Husain Yasbir FTO and Leila Sharif are not a Ghulam unit. They count as Ghulam for Purity FT Check, only that. So yes, it is legal to field 4 Ghulams and a Leila Sharif to form a 5 man Ghulam Core that is also Pure for FireTeam bonus
