I honestly didn't realise the actual in-game awesome effect of Kabuto with curse ninja (which makes sense from a game design and character feel point of view) his 'human experiment' passive actually triggers a full curse tag buff each time he uses it, and then Kabuto heals the damage afterwards, a 2 for 1 bonus. Had thought it would do that for ages, but as it was only 1 damage, pretty much forgot all about it (until Kabuto killed my whole team during Hidan strong approach easy after Haku drops everyone to 1 health... that was a funny if annoying eye-opener).
So yeah, having done SA on hard with Kabuto combo'd with Kimimaro and Tayuya, have given serious thought into some kind of mega-buff Curse-Tag team for ranked. Just need to now work it out in such a way that it doesn't just die in the first two rounds