inu-kun said:
I'd argue for Tyrion, his job was basically to prevent the capital from being conquered which he succeeded quite well all things considered.
And in general none of the rulers are (or can be) good guys and good rulers in the same time (and that's one of the themes), Tyrion is just miles above his sister and father in morality. And Stannis is pretty much the only king which worth a damn in the series.
How can I argue with someone who says such nice things about King Stannis?
So right now I'm solely speaking about Tyrion in the book. Show Tyrion's plot with the wildfire was smart. It wiped out a huge portion of Stannis' fleet and he was only attacking by sea.
Tyrion's preparation
Tyrion's preparation in the book goes like this. He finds Cersei and Joffrey have ordered the smiths to make more weapons, armor and arrows for men they're training to help defend Kingslanding. They are also planning to build more trebuchets and fling wild fire by hand at the attackers. This is a pretty conventional plan. Anyone would do this.
Tyrion derails this by tying up all of the smiths into making a chain. He then sends away 300 lannister men at arms that are Cersei's personal guard in a harebrained rescue mission to get Jaime (it fails). These men sit the war out as prisoners when they could have fought on the Blackwater and trained men to fight in the months ahead. He also sends away a number of naval ships to escort Myrella to Dorne. Including the largest ship in the fleet "King Robert's Warhammer" a 400 oar giant (Stannis's flag ship Fury is 300 oar, there are a handful of 200oars ships, but the rest of the navy are smaller 100oar galleys).
He does one thing right and releases his Mountain Men into the Kingswood to harass Stannis.
The Battle
In the book Stannis took 16,000 men all mounted by land up the Rose Road and sent 5000 fighting men (and countless sailors/oarsmen etc) by 200 ships to attack by sea. The ships are delayed by bad weather for up to 10days. This army is camped on the opposite bank of the Blackwater to Kingslanding. In the meantime Stannis has been building rafts.
When they arrive the battle is started in the morning. The ships fight a brutal but decisive battle against the small fleet the Lannisters have (about 50ships). Then a number of floating hulk are sailed into the navy. The Wildfire ignited and the chain drawn. A dozen or more ships are upriver of the Wildfire and spared, these drop fighting men onto the shore of Kingslanding. The Hound leads sorties against them. A number of ships including the Pirate Salladhor Saan are safe being kept in reserve behind the chain.
Stannis brings his land army up. His men use the intact ships upriver, the rafts he has built and some men use the burning hulking of his fleet that have formed a bridge (talk about badassery) to cross to the other shore. More sorties are lead against them. At some point the Hound breaks and flees the field. Lancel is wounded. As Stannis' men form up on the shore Joffrey leaves to hide in the Redkeep. Tyrion gathers his men and leads a sortie. It successfully drives back some of Stannis' men.
But Tyrion and his men are scattered. Mandon Moore tries to kill Tyrion, gravely wounding him. Podrick Payne kills moore. Tyrion is lying in the mud bleeding out as the sun sets, as Stannis' men overrun the shores of Kingslanding (he has about 8000 men at this point on one bank and the rest on the other).
Suddenly trumpets hail and a new host lead by "Renly's Ghost" (actually Garlan Tyrell) Tywin Lannister, Randyl Tarly, etc arrive. The mountain men having killed Stannis' scouts. There is some fighting but a large number of men surrender or turn coat. The Bastard of Nightsong leads a fighting retreat that allows Stannis and his men to evacuate with Salladhor Saan's ships. However there is only enough room for about a 1000 to escape.
Conclusion
Tyrion's grand plan of the Wildfire only cripples Stannis fleet. It doesn't affect his land army.
He wastes time and resources that could be devoted to more conventional tactics.
For all his cleverness he only manages to hold Kingslanding for about 12hrs, dawn to dusk. Had Stannis's fleet not been delayed by a storm he wound be holding Kingslanding for 10days before Tywin arrived with the Tyrells.
Now I'm not saying Cersei or Joffrey would have done better. Rather that Tyrion really doesn't achieve anything spectacular. The biggest damage he does to Stannis is preventing him from retreating with more men, which is a pretty big thing. But it doesn't help him hold Kingslanding in the first place.
Dear me I've written way too much...