I need to tap into a existing cast iron sewer line in my basement,what is the best way to do this

I need to tap into a existing cast iron sewer line in my basement,what is the best way to do this Make your cut with a set od ratchet cutters, (see image) or a Saws-All using a metal blade. You may then convert to PVC or stay with A No-Hub Cast iron wye or combination wye and eighth bend using No-Hub Clamps,(see image). What's your pleasure? Regards, Tom