Is Guinsoos rage blade still viable for Kog Maw

I love playing {{champion:96}} but I'm still a bit confused for what items i should buy with him, since his recomended item kit is so different from other ADCs. Should i just go for the usual {{item:3031}} and {{item:3072}}, or build strait into {{item:3124}}? Also why is health and mana recommend for Kog? Maybe riot done goofed a little?
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