For a semi comp list you will not be using most if any of the models you have listed besides Ahriman or Exalted. Gors, Spawn (with stratagem), enlightened and various armor and
FW armor are the big hitters we have now. Magnus is a big risk in a comp list and I would say leave him on the shelf. The codex has some powerful tricks and bits but overall its a rather mediocre codex if not used in soup.
I like it because Im not a tourney player so I can make cool fluffy lists and use rubrics
. If you need to win games and dont want gors....it wont happen.
To go into a bit more detail on why your current model selection cant be called even semi comp is follows.
Rubrics are overpriced. Warpflamers are bonkers over costed. SoTs are decent but not a optimal choice. Exalted Sorcs are once more a decent pick but for the points demon princes blow them out of the water in most cases (seers bane exalted can put some hurt on).
If you want a cool army (which it will be,
id love to see it assembled and painted) then go for it. But that is about all you can hope for
atm until we get our next codex.
NOTE : adding in demons greatly enhances the power level of 1ksons (
imho) and is very very fluffly. Perhaps look to pick up a few screamers, exalted flamers and flamers. Horrors of all colors are always a good choice.