Keep Missing Hits! Here Are Some Tips!
Just a few basics:
- Advantage increases your hit chance since you roll twice and take the higher attack roll. Try to take advantage as often as you can.
- If you’re playing as a race that doesn’t have darkvision, you’ll have a lower hit chance in poor lighting conditions, so take that in mind and work around it.
- Use weapons you’re proficient with, it adds your proficiency bonus to your attack rolls. Also specifically in BG3 it gives you access to different special actions / attacks.
- Early on you’ll still be missing a bunch, because Goblins have a pretty high AC for low level enemies.
It’s DnD 5e rules. Those rules are all about +/- “advantage/disadvantage” in loading the dice in terms of the outcome of RNG hit chance.
So you have to load the dice in your favor by doing things that give you an advantage (spell buffs, terrain, positioning next to allies) and doing things that give the target a disadvantage (debuffs, either from spells or items, terrain debuffs like explosions/fire/water/height). You also need to apply crowd control regularly (mostly by spells). You need to get used to using your casters for a mix of CC and DD to control the fight as well as doing damage.
Basically your goal is to set up the fight, control the battlefield, debuff or CC your targets, buff yourself … and then you will see better hit chances.
Use weapons that you’re proficient in, ideally matching your key stat. Melee attacks use strength by default, ranged weapons use dexterity, finesse weapons can be used with either, casters need a high ability score associated with their casting if they want to reliably land spell attacks or have enemies fail their saves.
Flat bonuses/debuffs (numerical modifiers) are intentionally uncommon compared to sources of advantage or disadvantage in 5E… never mind something like Pathfinder. But Bless and Bardic Inspiration are both available for flat bonuses.
Advantage sources include stuff like fighting an enemy that you can see but can’t see you, meleeing a prone target from 5′ away, attacking somebody that’s paralyzed or restrained, barbarians have reckless attack etc. Conversely, you have disadvantage if you’re attacking an enemy that have a sight advantage on you (e.g. in the dark, you lack darkvision and they have it), or to be using a ranged attack when an enemy is right next to you, or using a ranged attack on a prone enemy that’s more than 5′ away, etc.