When reading Sparky's posts, keep in mind that he's the ultimate slayer fanatic, slayers are his secret fetish (except he's not actually keeping it a secret, which makes it even worse

). But after you tone down some of those overstatements, you are left with a pretty accurate description of the class. Wardens can use some similar strategies as slayers, but as you noted, they are more defensive. There are quite a few other topics in this part of the forum about slayers and wardens that you can check out. But in the end it's up to your play style, and what suits you most.