You should go get a lesson or two. Then see if your slice isn't gone.
Nothing cures swing problems like lessons from competent coaches.
That said, (assuming you've had no lessons), you're probably coming from the outside, and with a reverse pivot.
If you can get some video of your swing (and upload it), that would be a big help.
With a mid-firm flex, unless you're a female or a senior, it should be a good flex - keep the club.
http://www.golf-tuition-online.com/v...highlight=tips (Tips from T.C., C.P.G.A.)
These are the results of my 2 lessons, aimed at getting a decent swing.
I had a real slice problem - and I still battle the occasional hip shift (I tend to sway back after a long layoff [like winter]).
I think the table drill may help, and if you can get in front of a mirror, you'll see all sorts of things.
Also, for your coil, Gord talks about trying to put the left shoulder over the right knee (for a RH Golfer).
There's so much advice to offer, but we need to pinpoint some things first...