Ok I made it to page 5...lol too many
But I'm sorry kakashi fans its sasori ftw..I do like sasori over kakashi, but that has nothing to do with my call. There are so many ways for sasori to win. Yes (kakashi fang) kakashi has the sharingan but it puts a strain on his body and like you said yourself the 1000 senbon was sasori 1st attack and also like you said kakashi would need the sharingan from the very first move. Again from u sasori puppets come in stages and kakashi would have to get pass them to get to sasori's heart, all while using the sharingan thats draining his already low chakra. Sorry but he is simply out classed. Yes I agree he could get out of the senbon but he can't dodge them all, he would use a earth jutsu imo.
Ways sasori could win (imo)
1) poison smoke the area (kakashi has to breath and if he do he's poisoned)
2) kazekage sand (I just don't see him getting past this)
3) 100 puppets (that took down a country, I don't think kakashi can defend a country alone, as seen in the pain fight)
4) drag the fight out (just avoid and shoot poison projectiles and out last him)
5) get him to use kunia (it can't shoot thru stuff so just keep something between him and kakashi, and he would faint from over use)
I could go on and on but you all see where I'm going
Kakashi notes
Was caught in a water prison (with his sharingan out)
Passes out after every fight even if he don't use his ms tech.
Sasori wins