That is a large problem with internet and playing styles but I will put on some tips and if anybody doesn't agree just say it but these tips are for tournament playing and not for friendly games.
- Ringwraith are fun on fell beast I agree but they are not good. A ringwraith only has 1 wound and 2 fate and on a fell beast it is getting shot to death. Also budget wraith are usefull if you want one with just some extra will to cast spells but with full power it is not usefull because named ringrwaiths are much better for only 10 points more. If you really want a ringrwaith on fellbeast just take the shadow lord his special rule makes him survive.
This is the shadowlord:
http://www.games-workshop.com/gws/catal ... rod1360002- Orcs with bows are not the best option in a mordor list. If you take them use them with spear and bow but if you don't just take orc trackers with or without warg much better.
- Your list doesn't have enough spears you have 36 models for combat and only 10 spear you really need more spears to get some real fighting done.
- Mordor uruk's are the least succesfull elite unit in a mordor list. I agree that the models are the coolest but black guard/numenorian/morannons are much better with their defence of 6.
- A mordor troll is not very usefull. It looks strong with fight/strength/defence 7 but it hasn't got any will so it will get transfixed and then he can't do anything. So that's why most competive mordor player don't take trolls.
Know just decide wich elite warriors you like more and take them but don't take 25 just take 20 or something because 25 is a little bit overtopped.