1. Choose a build, max 3 stats. Don't spread them in 4, or more. Think of your stat distribution as "stacking". 100 in charisma isn't likely helping you as much as the loss in the 50 to dex/luck . I would either put 250 in luck or charisma, as a warrior. Probably, Beast builds are the strongest, but a pure build is fine too. You want to max your stats to give you the best it has to offer.
2. Choose Items that cater to your stats. If you trained luck, you want items that utilize it. If you trained charisma, you want items that utilize it. Here is a decent site showcasing the best items. https://adventurequestwiki.fandom.com/wiki/AdventureQuestWiki_Wiki The Pedia isnt as helpful as the past.
3. Choose a subrace, get all armor variants. (I see you said werewolf) Subrace armors are the second strongest armor subset in the game, and the advantage of subraces are that they have variants that will give you all 8 defensive elements. Being guardian gives you one as a no drop. If you're a guardian, Neko/Werepyre gives all coverage in 3 paid-for armors (one being a no drop for 4) and werewolf/vampire you'll need to buy 4, one being z token, to get all elemental coverage. (the 5th being no drop)
4. Get your tier 3 class armor maxed, to L21. This gives you the Power-Level 150 versions. Strongest armors in game. Level 20 is only I think L130ish??? Paladin/Necro are the only options.
Actually, in theory, Paladin and Ebony Sepulchre (z token) if you owned both, you wouldn't need any other armor in the entire game and you'd probably whoop everything. Ebony sepulchre has a skill to turn monsters "undead", then Paladin's abilities come alive....and you get every resistance in 1 armor basically.
5. When choosing items, remember stacking . Don't just have an item that randomly does effect X. Have lots of items that all do the same X effect. The stacking then makes the effect powerful and worth using. I'll give you some examples. Fear- Inflicting a random Fear might get you a turn or two at a lower rate, maybe let' say 30%. But a spell, weapon, pet, guest all doing fear might jump this to 3-5 turns at 85-95%. Blocking builds (many say this is the best playstyle, while I'd argue it, it might be versus bosses for sure) Stack blinds, bth loss, defensive MRM blocking of various sources and monsters can't hit you. This stacks with blocking stats, like Dex.
6. Quick Cast -> Purple Rain Loop The game now has the ability to buff yourself without losing a turn, or a "quick cast". There are a few in shops, quests, and token packages. You basically start the battle, cast Purple rain, which you can buy in the memorial shop, and this creates a renewal point. Most cost SP, some cost MP. Then you use essence orb to regenerate SP to buff and buff and buff, then cast Purple Rain and it resets yours/monsters HP/MP/SP to the number at the first cast, but your buffs remain. This is mostly used against harder monsters.
7. Golden Gift Boxes- Best items in the game, usually. Don't just use them. Save them, and trade them in the account page under "gold prize swap". 25 commons can be traded in for 1 rare, and 10 rares for 1 Ultra Rare. You get a free box for playing each month, and another free one each month if you happened to buy and put the museum on your estate. In time, and with some luck, getting some these will be helpful.