Oh, don't worry, DT, I had to write a Slaking article for my blog last week, and every forum I went to mentioned Skill Swap Bliss and Power Slaking. xD
The only problem is that the strategy is worn, and like you said, only viable in 2 vs. 2; not to mention, everyone will expect it. That's why, with its ability, rather than thinking 160 Attack should mean "Sweeper," it should mean "Stallbreaker," which is where switching into a Stall should, theoretically, be where Slaking shines, since no Stall would attack on the first turn.
Maybe not even use Taunt, but just use encore, if you predict the opponent will use Block. The idea of this theory is dumb down the opponent so much, that its immobility is worse than Truant, which encoring Toxic (with Facade), Protect (due to rising fail rate), entry hazards, and Block will achieve.
Sorry for the long comment. :P