It's always better to prevent it than to try and fight it IMO. Why take the chance of having gyno start to flair up when you can prevent it all together. If 12.5mg ed is preventing you from making maximum gains by knocking your estro out than you need to go back to the drawing board and rethink your AI and adjust dosages according to blood work to prevent that from happening. Also why only 8 weeks on test E? I'd push it to 12 weeks and the halo to 6. But that's me.
When we do right nobody remembers, when we do wrong nobody forgets. H.A.M.C