You can take off Grass Cress and Dagger and put on the Demon Spear. Demon Spear is very helpful on this build so I do recommend that you have it. What I do when I get a bs is quickly change to Demon Spear to finish them off because the buffed Kumo isn't a 1 shot a lot of the time. If you seen me using this build I am pretty bad with it at the moment, I never really was a Kumo fan. This is just a build I made because I was extremely bored and never really messed with the Kumo because I don't really like it, but this build have changed my mind about the Kumo and I enjoy it a lot more. You can see the Kumo with Demon Spear layout here: http://mugenmonkey.com/darksouls/467214
I am sure that other can make a better version of this build. If you don't like 135 here is the 125 version of it: http://mmdks.com/7qiw