As to a list, I suggest staying away from doctrine interpretations. They are subjective, as in "subject to interpretation", and JW's think their interpretation is always the only one.
Stick to objective items that you can nail down. From WT pubs it's easy to prove that they are against lies. So use their own pubs to prove that they have lied in the past. Here is a letter which uses their own lies as its basis.
From WT pubs it's easy to prove that they are against contradictions of teachings. Here is an essay (kind of large to load) that uses WT pubs to illustrate many of their teaching flip-flops. For example, they've taught 6 flip-flops on the resurrection of the Sodomites. That's yes, no, yes, no, yes, no.
And don't forget the latest generation change teaching. A chart shows that they've taught 10 different positions on this matter. Can they honestly say that the Holy Spirit has directed them through this mess of zig-zags? One of their recent positions even reverts to the same one held some 81 years earlier.