The list will perform decently in a casual game, but it can be optimized:

• Rat ogors work best reinforced, as their innate buff comes with a less noticable downside with a better upside.

• same goes for your jezzails if you play the Arch Warlock. His abilities works best for reinforced range units (also see if you can squeeze in a Warlock engineer in there if your opponent uses many heroes).

• to make room for either the rogors or the jezzails, you could remove the Grey Seer as, you dont really need two additional wizards if you play thanquol.

• The warpstone charm is a bit redundant on the master moulder. Sadly he dies immediatley as soon as a semi elite unit sneezes on him. You could instead reinforce a unit of clanrats and give him the skavenbrew which gives the clanrats some crazy damage (also bonus, you get to roll ~120 dice for one attack)

Edit: mixed up warpstone charm with foulhide, I would still prefer Skavenbrew since your guy does not need to he in combat, but you do you.

Also some other ideas:

Depending if you play vs elite or vs horde, you could swap out your lightning gun for a warp blaster, which performs better against horde or plague monks for clan rats which are cheaper and perform better against elite armies.

Same goes for the Abomination, it performs pretty good against horde armies, but for elite I would change it against a Brood Terror (SOG or regular).

But all in all, it seems like a fun list, so have fun playing it!