Board Thread:LOC General Discussion/@comment-5616072-20130806121457/@comment-8122845-20131129232241

Because there is a very small window where the support deck provides a better defense than the main deck. Unless you have a good idea of how skills work, and can afford the necessary cards, your support deck will be less powerful. With the right cards, a support deck will only be slightly better than a good main deck. I see too many people making crappy support decks because they don't understand it. Thus, unless you know exactly what you're doing, you're far better off without them.