The change in the rules of the road to Gorgoroth prompts a re-evaluation of cards like Ash Mountains and Mountains of Shadow. Whereas Mountains of Shadow provides access from the West, Ash Mountains provides access from the North.
Also, for companies afoot or ahorse, this card is the only way aside from Shadowfax to travel from Lorien to Mount Doom in one turn. The prowess of the orcs is one less than that found when travelling to Gorgoroth from the West.
Why use Ash Mountain, a Mountains of Shadow, and Anduin River or the Fair Travels? Moving to Barad-dur or Mt. Doom increases the hazard limit by two. Unless you are Alatar, spoiling for a hunt, then you want to keep the hazard limit as low as possible because the automatic attacks are bad enough plain, let alone if they are enhanced.
Having an Ash Mountain, a Mountains of Shadow, and an Anduin River are just as effective and perhaps more playable than having a comparable combination of Fair Travels in Shadowland and Darkdomains. The first three guarantee you a -2 to the hazard limit (to a minimum of two), the second group merely guarantees you a -1 per card. Also, the Fair Travels means you have to guess whether Gates of Morning will be in play and you are limited to one of each on a company.
Thus it is more card efficient to use Ash Mountain et alia.
If you can reduce the hazard limit to two AND your company has Alatar, you could go for broke and play Great-road from Lorien to Barad-dur plus Ash Mountains, slay some orcs, grab the Ithil-stone or determine its fate, and POOF, your company is back in Lorien to heal its wounds and store the palantir.
Without Alatar, you opponent will draw twelve (12) cards to your three (3); Alatar's ability reduces the total hazard player's draw to 10 (5 *2). The hazard limit starts at company size +2 for a minimum of four (4). Don't forget to have a ranger or two in the company, perhaps one of the elven orc-hunters.
Original card review taken from : http://fan.theonering.net/morgulrats/
With the authorization of the webmaster.
The reviewing team consisted of Gwaihir (Chris Farrell), Gimli (Nathan Bruinooge), Ohtar (Charles E. Bouldin, Esq.), Radagast (James Kight), Joshua B. Grace (Beorn), Martijn Steultjens (Fram Frumgarson), Jason Klank (Saruman) and Jeffery Dobberpuhl (Wormtongue)