Afraid not, but I can give you some personal pointers (I'm the guy who wrote the official walkthrough for the game).
For the Adventurer, I usually go for an axe build or a dagger build. If you go for an axe, I recommend the Villain Axe you can buy in Piratetown, because it attacks twice. Double-attack is the most useful trait a weapon can have in the game, cuz it also doubles the amount of TP you can get per round. Yes, axes deal inconsistent damage, but I still prefer them over swords, cuz their weapon skills are more useful. Put all your skill points into ATK, and use equipment like Wulfrick's Spiked Collar and Saphura's Submersion (from Saphura's chests), to boost your ATK even more. Daggers are more useful for bosses, so if you pick one, I'd recommend Lazora (from Duiro's chests), cuz it gives you +20% Speed. Daggers have lower base damage than the other weapon types, and they rely on your Speed stat to deal damage with their skills, so put all your stat points into Speed, and get two Bottles of Lube from the hyena dude on Pine Island, for 20% more Speed, and more equipment like Shaun's armor from the Pirate Hideout. Since dagger skills ignore the enemy's DEF, they are great for bosses, but a pain for farming because of the low base damage.
Lace is your most powerful character, and also the most versatile. Personally, I always go for a fire build with him, because of the extra damage. Plus, the Scroll/Rune of Healing Wind from the Gloomy Forest evens out the lack of defense from most of your characters, if you go all in for power. So, put all his skill points into MTK, craft the Flaming Scepter of Rubyro at Anubu's station, and buy the Mage outfit in Piratetown. You can also use the Beautiful/Elegant Kimono from Silky's house instead, to reduce spell costs. And of course, get the Inferno Ring, unless you got enough cash to blow on a spell book.
Wulfrick's Draining Claw skill used to be absolutely OP, but Spedu nerfed him. Since he has so much armor that boosts his max. HP and DEF/M.DEF, most people tried to make him tanky, but that came at the cost of him dealing damage. Luckily, he finally got some support to balance that out! The Bulbark you can get from the first Water Dungeon's boss's chest is absolutely OP, and encourages you to spread your skill points across DEF and M.DEF, and use armor like the Bounty Hunter's set you can buy in Piratetown, and the Steel armor pieces you can craft in Shiptown at Horgath's station. That way, Wulfrick's base damage gets absolutely insane, and most enemies will fail to deal even 1 damage point to him. The only downside of that used to be that his Draining Claw skill becomes useless, since its damage is based on your ATK stat. But now, thanks to Wulfrick's new toy in the Deep Mine, he has a new skill that deals damage based on his max. HP stat!
Fucko is a little wonky. The safest bet would be to go all ATK with him, just like with the Adventurer for an axe or sword build, and give him equipment that boosts ATK even further, especially the Captain's set you can buy from the Quest Guild merchants. and Ruby Rings you can craft in Shiptown. Also, give him the Stinker you can get from Nick's home, since it has double-attack. A more rogue strategy would be to go completely for SEXY, aka get him the "No Shirt/Gloves/Pants/Shoes"-set from the third Water Dungeon floor, and the Pin of Acceptance you get for completing the pink dragon's questline, and Richtor's Vibrating Toy and the Designer Sunglasses from his hotel. The Heartache is a pistol that can randomly drop from the first Water Dungeon boss's chest, and it adds your SEXY stat to your critical hits. Fucko's skill Fan The Hammer attacks an enemy five times with the chance for crits for each shot. So, that build can deal insane damage if you get lucky, and multiple shots using that skill crit.
I hope I could give you some neat ideas for fun builds. Generally, builds that are offensive are the best options in the game.