i always used to skip the 2 bell (gargoyl and queelag) is it a legit run? do i need to beat those 2 bosses? [Ani%]

Hello. For any%, It is possible to skip those bosses to access firelink altar but in this case you need Kaathe, and in this case, you need to beat the 4 kings, and therefore Sif. But it's slower than beating Gargoyles and Queelag and ring both bells. You can't access the kiln without Kaathe or Fampt being awaken.