If you suspect that your opponent will sideboard in some lifegain effects (which are really good against burn), consider bringing in this enchantment to shut those cards down
All that said, its hard to pass any sort of judgment on Battles without first playing with them
Did you know there is a way to turn a Proxy Black Lotus into the real deal
Greedy Freebooter As far as 1-mana pirates go, theres definitely better
And instant speed too, by the way, so you can drop stuff in response to people attacking if you need defense, or at the end of someones turn, right before you untap and attack with them
It rewards you for having a constant exile cards engine, and it goes in line with what the dragon Teval, the Balanced Scale is doing