Injections offer the best feminization overall. My friend who was on patches for 18 months had very little breast growth even with genetics on her side. She switched to injectable E and her results took off! We often talk about how much larger her breasts have become in the last almost-year.
Why are you still taking Spiro? I told my doc I want off Spiro, he obliged and I've never needed it afterwards as the injectable E was keeping my T under 20 every time we tested thereafter.
Good luck.