And by effective I mean with everything taken into account. Including a buff.
To me personally if minigames were to ever be implemented to spice up mining and other professions it would be in the form of “Do this minigame, if you do it well, good for you, you do it normally, if you fumble, you get less than expected”.
That would surely put a big red on the multiboxers that have more than 10 accounts to mine ice every single day in High Sec and maybe we would see more fleets with actual people in them.
The buff you are trying to put in will be huge when you are sitting in a hulk, with a Rorqual providing fleet boosts and pretty much a fleet of other hulks just digging away asteroids. The rich get richer and the poor… Well… Continues being poor because if the boost would have to be tweaked in order to be balanced in null or low mining fleets it would be quite miserable to the solo miner.