i'm not sure the question, minors are like free cards, play as many as you like if you have the right stat and level
or are you asking in something like if faerie fires stack +10 dam +10 dam?
what's the specifics of your question?
Here's the example I gave in my question thread on the WOTC forum:
"I'm activating my Drider and put Faerie Fire on my opponent's Dwarf Cleric, which resolves. Then I tap the Drider and play Shadowy Ambush, attempting to hit the Dwarf for a lethal 60. My opponent reasonably responds by using the Cleric's ability, targeting Faerie Fire to attempt to reduce the damage by 10. Can I respond with Quick Jab?"
The response was that you can only respond to things with Immediate actions. So you can play as many minors on your activation as you like, but the stack has to be empty.