Dbol is liver toxic. It'll bloat you up and your gains will be gone almost as fast as they came on. Besides, you can get some pretty bad nausea from them and that'll affect your ability to train and diet right.
If you want a good oral to go with your deca/test cycle, take proviron. It's pretty mild on your body and will give you some strength gains. Plus it'll help keep your dick working right on it.