From the strongest to the weakest
(not counting the stand-ins (Human Torch and Destroyer)
 
My order would be:
 
#1 Silver Surfer
#2 Fallen One
#3 Morg
#4 Stardust
#5 Firelord
#6 Redshift
#7 Terrax
#8 Air Walker (humanoid and android)
#9 Nova

This is how I would rate them accept switch Stardust with Firelord.

" This is how I would rate them accept switch Stardust with Firelord. "

" @Vance Astro said:

" This is how I would rate them accept switch Stardust with Firelord. "

I think Startdust being pure energy may give him an edge over Firelord.    "

" @StrongestOneThereIs said:

" @Vance Astro said:

" This is how I would rate them accept switch Stardust with Firelord. "

I think Startdust being pure energy may give him an edge over Firelord.    "

I think Firelord NOT being pure energy gives HIM the edge over Firelord.He's vulnerable to energy manipulators and alot of cosmic are. "

1. Silver Surfer (current power level)
2. Morg (original with well of life, drop below Fallen One without)
3. Fallen One
4. Terrax
5. Firelord
6. Stardust
7. Nova
8. Red Shift
9. Air-Walker
 
After dipping himself in the well of life, Morg was a monster. Even after he was depowered by Galactus, he put up a good fight with all the other heralds, including killing Nova. When he was resurrected, he was not given as much Power Cosmic, but still extremely powerful.
 
Terrax hasn't been portrayed as well as he used to be lately. I don't think Firelord could handle Terrax. I love Firelord, but Terrax isn't getting his butt handed to him by Spider-Man, CIS or not.
 
Stardust is hardly a match for the Surfer, but Firelord has shown to be somewhat of a challenge for him. I give Firelord the edge over Stardust. The only thing Stardust has over Firelord (and any herald) is the ability to simply reform after being destroyed.
 
Nova was never used to her full potential. Her most incredible feat was destroying a star to create a black hole. She is the only other herald trained by the Silver Surfer to use her power. She was mainly written as a love interest for the Surfer (in his own book) and therefore was made the rookie and the damsel in distress. I give her the edge over Red Shift and Air-Walker. 
 
 I really haven't read too much about Red Shift but by reading his bio and seeing what other people say, this is where I place him. 
 
Air-Walker is not that powerful as far as heralds are concerned. I mean, seriously, he's been killed four times.

Silver Surfer 
Fallen One  
Morg
Firelord 
Stardust
Red Shift  
Terrax 
Nova  
Air Walker (Android) 
Air Walker

Silver Surfer 
Nova 
Air-Walker 
Morg 
Firelord 
Red Shift 
Terrax 
Fallen One 
Stardust 

Silver Surfer
Fallen One
Stardust (because his body is composed of the fundamental forces)
Air Walker
Firelord
Nova 
Morg (Don't think morg was all that powerful at original levels. just ruthless)
Terrax
Red Shift

What has the fallen one Really done? does he have a another good comic? And how is the surfer so high, on everyones list, Doom has taken his powers a couple times.

Tyrant

Silver Surfer

Fallen One

Morg

Terrax

Air-Walker

Red Shift

Firelord

Nova (Frankie Raye)

Stardust

What has the fallen one Really done? does he have a another good comic? And how is the surfer so high, on everyones list, Doom has taken his powers a couple times.

I'm not saying he isn't smart, but smart dosen't make someone Tough. I'd put Morg, or Terrax at top, maybe Fallen one, but that is because I thought he was cool And I do like the FireLord. Air-walker at bottom, Stardust, Nova, and Red shift.

Surfer at the bottom in the top 5

Tyrant, Wait he dosent count

Morg, Terrax

Fallen one

FireLord

Silver Surfer

Fallen One

Morg

Firelord

Stardust

Terrax

Nova

Red Shift

Airwalker