GothmogtheWerewolf wrote:
They don't have Ringwraiths or Gothmog
That's basically it. The better Ringwraiths provide a huge lift to combat performance and the rest are still very useful due to access to the Darkenss list.
Then you have the same 25pt high defense troops (which are better vs some other armies but not generally Gondor), which you then lead with your courage 5 heroes. Plain old Orcs with 2HW are also very good with Ringwraith assistance. I like some of the other units like morgul Knights and Black-Guard of Barad-Dur too.
Even without the top-tier Wraiths, you can still do a lot to control the battle through 1. Pall of Night to prevent charges (the only way to prevent this is o use might or go second and unser Wilderness counter-spells) 2. Wings of Terror to allow large flanking moves and long-range charges (countered only by Wilderness spells) 3. and then you have other useful spells like 'Strength from corruption', 'terrifying aura' (actually quite useful vs Gondor if you bring the Tainted), 'visions of woe' (with the Tainted).
Gothmog is generally employed to shadow to really effective duelers like Boromir and Aragorn and mic their actions and try and take them down before they hit their target.