Eredan's World

Overall
I agree that the pirates are one of the most fun but unfortunately least competitive guilds at the moment. I've always been a steam-punk fan, so the steam-tech and gunpowder on the high seas...the way the art is done it's just plain fun. The addition of [card]Catch![/card] was a really important one in terms of manipulating powder, which until that point was either stuck on you until pistol-bladed, [card]Armada[/card]-ed, or phoenix-ed (which isn't really healthy for you). The only other ways to currently avoid this setback were [card]Potato Peeling Duty[/card] or [card]Fiery Sword[/card], and then having [card]Fierce Lion[/card] on [card]Nut[/card] with the Mechanist release.

Powder
To contribute to the pirate theme, it might be good to add some kind of equipment (say, "Volatile Hand Cannon") which reacts to fire damage if the user has powder. The user still takes the fire damage unless it comes from consuming powder [basically, Flames of the Phoenix], but the flame sets off the powder in the cannon doing 1 fire damage per powder token to the foe currently in battle and 1/4th to 1/2 damage to the pirate holding the cannon. You get the idea. More powder manipulation = more yarrrrr, matey without relying on mechanics other guilds can access.

Marauders
The other shortcoming of the Pirate deck in competition is that the guild only has two Mages and only recently got a true Marauder stable. Although [card]Narwhal[/card] and Pirate Marauder actions can make them very unpredictable, they rely on outside attack buffs to have any chance of overcoming high-defense / Armor opponents. The time it takes to set up three [card]Jolly Roger[/card]s and utilize your [card]Extortion[/card]s to keep the opponent in check is a big hit to deck space and doesn't seem very 'in-you-face' Marauder-style.

Mages
Back to Mages, I haven't really seen anything go here. The Lightning theme is very interesting (and certainly grounds us from the shock of thunder-Bragan) but has no match for Noz Dingard's lightning AoE just yet. Dance is a decent single-target hitter and they can use Static and Chains, but they need something to match the Noz's defense/spirit stacking and level 3 Lightning Bolts (Lightning Rod helps a bit).

Castes
And of course, each of the other guilds has a full-fledged caste-deck at this point, and many dual-caste options. Even Eclipse, World Tree, and Compendium can field three members. I'm not sure what all could beef up the caste, but there's a lot of open pathways there. And, of course, there are plenty of options for another caste or castes. Pirates could take on affiliations by Captain [Kilcrew, Mylad, Hook(?)], loyalty [Loyalists, Mutineers], or secret society [White Isle Vagabonds?].

I agree, not enough golems! That said, my thinking is a bit different. More specifically:

1 - Where is Delko's golem?! I think this shouldn't be character, but something vaguely like:

Draconian Helper
Class: Craftsman
Item Pet

Becomes your character's pet.
One copy of this card per character only.
+1 Max Health +1 Defense.
If "Draconian Helper" is played by Delko, -4 to damage taken the next time this character is in a fight. This effect can only occur once per character per Draconian Helper.
Chain.

This would let you play Draconian Helper again by Delko on the same character to tinker and refresh its energy, but limit the effect to once per character.

2 - I really like the idea of a Desert Nomad golem. I think it could benefit from not gaining the +1 Defense to other Nomads bonus until its first evolution (Level 2), and in final form having "If affected by a damaging spell or a magical attack, Sandrock gains +X Spirit, where X is equal to Sandrock's printed Defense for the purpose of that spell or attack."

3 - Kotoba don't need to be left out!
Clay
Class: Warrior
Species: Golem
Guild: Kotoba

Spirit: 0
Attack: 5/8
Defense: 1
Health 14

Chain if playing Kotoba item.
Turns 2 and 8: +1 Attack

@Level 2
+1 Defense
Turn bonus becomes 2, 4, and 8

@Level 3
+1 Attack
Gains text: "Clay" is treated as both "Ramen" and "Masamune" when playing items.

Love this list! Fiddling around with my collection, here's all the info I have that isn't on the list yet (you probably have some of this and are waiting to update):

I'll post more as I reach the experience to upgrade! If nothing else for ones you've recieved information on from another source, this should make a good copy/paste block for you