I just had another quick look, the skaven will decimate you most likely, they just have so much more stuff, ranged superiourity and again multiple sources of mortal wounds. Even if their point value is fairly low they might actually be one of the better armies of these 4 lists.
The aelves will most likely dominate you too, out of the 5 armies they have the best ranged capabilities by far, they're fairly sturdy, especially with the archmage's shield and do quite a lot of damage.
Anyways if I'd have to rank them it'd be as follows:
1) Aelves: they have ranged superiourity over the others, they are quite sturdy (especially with the archmage's shield) & have a big monster
2) Skaven: decent ranged, by far the most numerous & will win any battle of attrition if they can keep their warpfire thrower & wind mortar save. If the warpfire thrower had a better range or the poisoned wind mortar was more reliable (1 attack is liable to miss) I'd even rank them above the aelves. As long as their two weapon teams & engineer are allowed to take potshots they'l bleed you out eventually.
3) Stormforged: decent well rounded army, but slow. Has acces to mortal wounds & healing while being very sturdy but is simply outgunned at range in this match up. It has an advantage if it gets to play a defensive objective type match though.
These three can be fairly equal depending on circumstances.
Trailing behind:
4) Seraphon starterset: has a big monster and some halfway decent cavalry. No significant range & 12 warriors isn't going to get you anywhere. Also no mortal wounds unless you kitbash a starpriest. Kitbashing one of the Knights into a scar veteran helps a bit, but isn't going to win you any matches either. It's basicly just a big monster + some (halfway decent) fodder if you stick to just this box.
Far far behind:
5) Bloodbound: has a dude with a magic axe that might oneshoot your heroes & monsters, other than that it has nothing of note. No numbers, no ranged, and it's big scary monster is fairly harmless. The Khorgorath really should be fielded like the rat ogors, in units,not as an individual. Also does anyone know why the Khorgorath can only be bought as part of the starterset?