Nice, thanks for sharing. However, that is still not as efficient as 12-5. 12-5 nets me around 4.6k gold and 1k seeds each run, for 40 stamina. Running it twice (equal stamina with ?-4) should give you 9k++ gold and then using the seeds and selling the units will give you another 5k (assuming all pulled were 2*, each sold for 250).
In total it still yields more gold than ?-4 even if the seeds from ?-4 were translated to gold as well. Not to mention, running a map twice means you get more chances of secret gardens, raid bosses, and ampies. Speaking of which, I know gardens spawn from ?-4, I'm not sure if raid bosses and ampies spawn from ?-4. But I have not done ?-4 enough times.
Even if they do spawn, having twice the chance is still more worthwhile. Also, having more seeds to pull means more chances to upgrade any girls that you need too. Finally, the experience gained from 1 run of 12-5 is already more than twice of ?-4.