In between rounds of the off-site Old School event, hosted by Eternal Central, I was able to play pickup games of Alpha 40 against Bog Agra and Shane Semmens
You could also consider an artifact creature with a white and black ability, too
Even without these specific synergies, the card is just a solid grindy value engine, however, so the floor here is pretty high
It does lose the ability to tap for mana if you do this, but since the name changes, you can play another Irencrag and both the mana rock and Equipment will remain on the battlefield despite being the same card
If you have the only artifact in play, playing Manic Vandal might be quite depressing
Its a neat board wipe, and it may have some play as a turn 3 play and turn 4 wipe in some white-based control deck in Standard