I've used both offensive and bulky, and personally, I'd say its enough that A DD set in general is the first set. Yeah, bulky-wisp is some of the greatest shit of all time, but char-x is just so much better than other DD'ers it's a waste for it not to be the first set.
If we're talking about whether offensive or bulky should go first, i'd say bulky. Its decent defensive typing lets it set up on many electrics and char-y. Checking char-y is especially notable as char-x is not pursuit trapped, unlike lati@s.
In general, speed and power is gained slower with bulky zard-x, but now you get to use its typing and STABs to weaken its own checks and pivot and help check stuff in general. That kind of flexibility, with the set-up opportunities that bulky zard x has, is way too much to give up for getting speed and power quicker and hitting heatran.
If we're talking about whether offensive or bulky should go first, i'd say bulky. Its decent defensive typing lets it set up on many electrics and char-y. Checking char-y is especially notable as char-x is not pursuit trapped, unlike lati@s.
In general, speed and power is gained slower with bulky zard-x, but now you get to use its typing and STABs to weaken its own checks and pivot and help check stuff in general. That kind of flexibility, with the set-up opportunities that bulky zard x has, is way too much to give up for getting speed and power quicker and hitting heatran.