I'm not against the plan opening, but putting it on Minion is really bad. I can't even think of the draws you're hoping to have on turns 3/4 where that works out.
You could luck into having 5 coppers, or maybe oasis into a $5 hand, but even then you don't get to trash.
Putting the plan token on Oasis and trashing an estate on turn 2 seems ok. You have a reasonable shot at buying a Minion from here on, and if you don't at least you'll swap an Estate with another Oasis. There is no need for plan on Minion. Your deck can handle 4-5 oasis easily, and that is plenty of trashing. The fact that you can get the trashing going right form the start makes up for putting it on the card you don't really want all 10 of.
After that, my plan would be to skip Saboteur and Duchy, buy all the Minions, and the endgame is just buy more points with Provinces.
The double Saboteur plan is something I would keep in mind, it just wouldn't be my initial plan and I'd hope to avoid it.
I agree with skipping Ironworks. One Shanty Town is certainly enough.