I normally set down a pair of crucible and liqud transposer and have the recipe "4 pearls and one empty bucket -> one resonant ender bucket" in the interface. Then I set an itemduct to pull items out into the crucible and the transposer. The crucible gets ender pearls whitelisted and the transposer gets empty buckets whitelisted (well maybe that isn't needed for both machines do only accept things they can work on). The ME import bus would then be on the infuser.
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Chris Becke: That would be the most horrible scenario. That way you always have too much resonant ender on stock and eventually miss the ender pearls for other recipes. Even a liquid level emitter can't prevent this because liquifying ender pearls is a time consuming task and during that time far too many pearls are exported. Remember, AE is no logistic system. It's for autocrafting and storing things.