Why only 2 Desert Lords and only 3 Seasoned Leaders?

I disagree about Red Wrath. With this deck, you should be able to have enough twilight to play it. Because it needs you to exert your minion, the ideal is to put it on a minion with an exertion left and a seasoned leader on it.

I found that this type of deck needs red wrath. Try to exert every companion into Red Wrath range, play two minions with 2 vitality left and you have a dead companion. Exhausting everyone is a lot harder especially with those high vitality companions like Gil-Galad. If you play the wrath, you can kill 3 vitality companions who were unwounded. The strike can’t do this.

Minions with some vitality left doesn’t "only give you a cosy feeling". They can be used to play RW or they can’t be killed with 1 wound which is good most of the time.

I believe in keeping a shadow deck down to 32-36 cards.

Look at the cost of Desert Lord. I guess I am just used to playing against choke decks here in our group. Everybody here puts allot of thought into twilight costs when making a fellowship deck. I noticed that other people dont seem to care in the least bit how much twilight will be available to the shadow player(s).

In the first few sites, Desert Lord is not going to help much.

I suppose you could take out one Raider Halberd and replace it with one Seasoned Leader, but you need to have a Raider Halberd in hand if you want to use every bit of Shadow twilight and still be able to use Whirling Strike.

Again, its about the cost. I usually do not have enough unless I sacrifice playing something on the Shadow phase.
Here is an example:
1. I could save a vitality and 5 twilight for RW to kill a companion with 2 vitality during the Skirmish phase.

2. I could use that vitality to add an exertion to that same companion and save only 3 twilight for WS to kill him.

Also...
I dont think you understand that I need every bit of vitality for exertion and that I cannot waste vitality for each minion, because the shadow player chooses who is assigned to skirmish the companion with 2 vitality left. I need to keep my options open so I can kill the companion no matter how much vitality the minion that is skirmishing him has.