You have to be careful running too many ratling guns, they only move or fire where a poisoned wind mortar for example can move and fire. I'm not a huge fan of stormvermin because while they are a definite upgrade on clanrats most times it doesn't justify the cost and they get spell targeted much faster. Doomwheels are always awesome and I love running those, usually in pairs. The warp lightning cannons, like many skaven heavy weapons, are a mixed bag but for the price are hard to beat. I personally prefer Hell Pit Abominations because they soak up huge amounts of firepower. I've never fielded enough jezzails to matter, I only own 3, so I wouldn't say anything about them. I've never used the poisoned wind globadiers either, I have 18 censer bearers instead when running that way, but I would imagine they function fine. Slaves are always fun and with slings they are just wonderful. In the future you may want to consider rat swarms instead of giant rats. While the swarm doesn't hit hard it is a great way to bog down units you need to stall out so they dont hit troops you care about. Hope this helps and if you are playing today I'll be there with a skaven army.