All injectables stack well with Dianabol, with partial exception that at higher doses of testosterone Dianabol becomes less useful and eventually entirely unnecessary. As examples, at 500 mg/week of testosterone use large improvement in a steroid cycle can be expected from adding Dianabol, but at 1000 mg/week only a moderate improvement is likely. At 2000 mg/week, possibly no noticeable further increase in effect will be seen except with individuals who have already reached a plateau at that amount of testosterone-only usage. For most this will not be the case.
As an example, should you choose to run a cycle that includes both Dianabol and Anavar, you will need to be extremely careful when it comes to overlapping them. The two are both hepatotoxic, which means they will cause liver damage. You will need to consider this carefully when it comes to choosing cycle lengths. If you take Dianabol for four weeks at the beginning of your cycle, then make the switch to Anavar, you should limit your Anavar use to four weeks, as well. This reduces your entire cycle time to eight weeks, which helps to alleviate some of the risk of liver damage.