StormRaven,
I hear you on that. Something to help you....
WEAPONS:
When it comes to weapons and cards. The more specialized it is with cards (multiplied) the more damage it can do but the less multifaceted it will be.
In other words, if you are attacking Dark Lord who is a Large, Demon and Undead you could do a Minorous (Large), Strouf (Demon) and now that they will have it Pom something err other card (Undead). Combine that with Mild Wind Level 7 for holy and you have good damage. Note, I used Dark Lord as an example. Do not try to go Heat and pounce them like a dog in heat. You'll die.
What I have done for a broad use of my books is get a couple of Abysmal Knight cards with a size card (e.g. Minorous/Skeleton Worker) for MVPs. It only does a few damage points less but overall it's more useful against many MVPs. As mentioned I use a +X Hardcover book with Malangdo enchants (Fight Sprit/Sharp) and a ATK card since I could not afford a Turtle General card as my general use book.
The elemental books are a good start and the element is irrelevant since Mild Wind overrides it.
HEADGEARS (just some options I came across):
1) Mythical Lion Mask (Upper/Middle): Good Dex (+2) addition, adds chance to stun and adds +2 ATK for each refine.
2) Witch's Pumpkin Hat + Gozer Mask (Upper/Middle/Lower together): adds +2 STR, +2 INT and +10 MDEF....+30 ATK (combo), +15% damage against Demon/Undead and increases rate to gain Pumpkin Pies, candy, cookies...etc. One of the best undead/demon headgear combos there are.
3) Star-Spangled Bandana + Black Devil Mask (Upper/Middle together): (+2 all stats from both), +10% damage to all classes (bandana) and you get 2 card slots between your headgears. Additionally, you still have your lower headgear slot open for a Peace Pipe (+5% reduction Undead/Demon) or something else.
4) Enhanced Hat of the Sun God (Upper/Middle): if you are ever able to get your hands on this really rare gear; it has a card slot, +3 STR, +2 DEX and added +45 ATK/MATK if you get it refined to +9. Some down sides are some people don't like its looks, it's heavy (relatively) and takes upper and middle headgear slots so only 1 card. Hard as hades to get since the God item to make is usually in the Billions of Zeny to buy as well as the hat.
5) Cat Ear Beret Hat (Upper): Good for demi-human and PVP/WoE. ATK +5% and can add another 7% at refine level 12.
6) RWC Commerative Pin + Black Devil Mask (Upper/Middle): adds +X% ATK/MATK based on the RWC rings/pendents used. You get more +ATK% for unslotted (uncarded) rings/pendents.
Just some thoughts...
-Sladeero