I'd say Holic is as reliant on TRC as TRC is reliant on it. It is only later on in the Holic manga that its dependency is more clear, especially with the arrival of (SPOILER)R!Syaoran at Yuuko's shop.

I was not talking about the full connection between FWR, because I realize that we do not know why FWR chose to (SPOILER)clone Syaoran. I suppose it has to do with in part their blood relation. The fact is that Syaoran is powerful enough to have evaded FWR capture. That is what I am talking about. I do not know if they mention it in TRC, but the only reason FWR was able to capture R!Syaoran is (SPOILER)he paid a price in advance to Yuuko, in order to guarantee that should anything happen to Watanuki that he will live on. His price was his time and freedom. He paid it by being captured by FWR. That is why, when he finally pays it in full, he is able to escape from FWR's clutches. That was what I was referring to not the full relationship between the two, just as to why he was captured.