Why cant I get this right?!

OK 4 days to ard boyz and I cant finalise my army list. I wish I had more time to play test.
Ive got in 1 game against daemons and I smashed them off of the table. It was expecting no less though with their strength being high toughness monsters and me having enough poison to make the great unclean one shutter.
I need to fight against a fully meched marine list and see how I am going to stop it. Gah! more time more time....
I'm going to have my last chance for a game tomorrow against John and the IG list he is planing on taking. If he has listened to any of us trying to help him with list design he will leave the foot list at home.
So as of now the list is sitting like this
Archon 9 wyches in raider
duke 9 warriors in raider
10 warriors in raider
10 warriors in raider
10 warriors in raider
4 trueborn in venom
4 trueborn in venom
4 trueborn in venom
6 reavers
6 reavers
ravager
ravager
ravager

I'm not giving away all the details but I think it will hold up well against any opponent. Every squad can deal with tanks and every squad can deal with MEQ killing.

I'm thinking about taking all the assault elements out of it and just playing keep away from the assault based armies.

But then another part of me is telling me there isn't enough assaulting squads in it.

Then there is the third part that just wants to crawl under my desk and stay there until this all goes away. "You don't want to go, there are douche bags at these things."

Agh see this tourney is going to drive me to drinking.......

If I lose in round one yeah I will finish but watch out for my case of beer under the table.