I wish either Sengir or Binnie somehow added an exception for nether stars in the mutator. I mean, it's technically one of the hardest non-GT items to get and it gives such an amazing boost, so it should at least not mess with the resulting bees.
By the way (or perhaps being a bit off-topic), for some reason, chocolate frames don't seem to lower the lifespan of bees anymore (most likely a bug). This means the best ways to make bees die faster are either oblivion frames (extremely rare, unless you have Dartcraft or other mods that generate lots of dungeon loot) or necrotic frames, both from Magic Bees, which don't consume vis any more ever since 2.0. Also, as of 2.10, you can make them even without Thaumcraft, but the recipes are kind of absurd. Especially the one for oblivion frames.