My pathfinder group is starting a giant slayer campaign and I want to make a hafling giant killer but I’m still kind of new and need help
Mouser immediately comes to mind. But a ranged bard or sorcerer would also be good. I will warn that the first book of giant slayer has very little downtime, so classes that rely on limited resources will struggle. In later books, this won't be as much of a problem, but still seems to be a bigger limitation than in most APs.
Ok thank you this should help
How big is the party? If it’s small, summoner could be fun.
Gnome has more options geared specifically towards fighting giants, but halfling can do well also:
The Risky Striker feat can be nice (bonus damage in exchange for armor class) and works well in conjunction with two-weapon fighting (something halflings are good at).
Steadfast Slayer is another strong damage booster, but rather an alternative to Risky Striker: It expects you be the only threatener of a giant (more risky with lowered AC) and to use a two-handed weapon.
A halfling paladin profits both from increased accuracy and the alternate favored class bonus (lay on hands becomes stronger). The weapon die might be one step less, but you have smite evil as occasional damage boost.
Keep in mind that reach weapons for Small creatures have the same reach as for Medium creatures.
Finally there is the good old sling. Usually a lousy weapon, some investment can make it much stronger: Large Target adds to damage, the warslinger alternate racial trait makes you reload at bow speed and Slipslinger Style allows you to use a sling staff with this trait (in addition to another +1 damage and no AOO from reloading). Even a halfling can make it to considerable strength for bonus damage over time, and they start off with great accuracy (+2 Dex, Small).
You will be fighting large creatures in mountainous terrain or hilly terrain I assume so mobility and ranged options are good.
As a Halfing I second Sorcerer and Unhained Summoner.
Other recommendation is Kineticist. This is a tricky glass to build and for some is hard to initially get the hand of but very easy to play once you do.
Not to be too spoilery, but you don't fight a "lot" of giants until the end of book 2, so around level 4 or 5. There are giants before then, but they are more spread out.
My wife is playing a halfling underfoot monk (from the ARG) in PFS, and having a great deal of fun with it. The archetype gets Improved Trip instead of Stunning Fist; as they advance, are treated as progressively larger size categories for determining what creatures they can trip.
Her damage output wasn't huge until she could afford an Amulet of Mighty Fists (with powers that added bonus damage dice) and a Monk's Robe at level 8. But at all levels, she's been able to consistently maneuver around enemies and trip them, which sets up a LOT of AoO's for her side.
Sneak Attack Damage doesn't scale down with size.
Grappling doesn't have a size limit, and it would be pretty hilarious to Grapple and Tie Up Giants as a Halfling. I used to play a PFS character who had a full-time GMB of 30 at level 9.
The Harder they Fall Teamwork Feat bypasses the Size Restriction for Tripping and Bull Rushing.
Is there anyway to get sneak attack without going rogue?
Stay ranged because those giants can kill with about 3 solid hits, or a single critical. And approaching them almost always gives them an attack of opportunity.
Is there anyway to get sneak attack without going rogue?
Vigilante with stalker specialization has something very close: Hidden strike, with 10d8 respective 10d4 by level 19.
Ninja is an alternative to regular rogue, with full sneak attack progression (10d6 at level 19) and a stronger focus on combat.The assassin prestige class is a classic, and progresses as quickly as a rogue. That means 5d6 at level 9.
The brawler archetype snakebite striker starts with 1d6 at level 1, and makes it to 5d6 at level 20.
Slayer makes it to 5d6 also, but starts at level 3.
A bard with sandman archetype achieves 4d6 at level 20.
Variant Multiclassing results in 4d6 at character level 19. It stacks with any sneak attack from regular classes.
The Accomplished Sneak Attacker feat boosts your progression by 1d6, but you need the class feature first and can't have more than 1d6 per 2 levels (rounded up) for it to work.
From my gut feeling I missed some options.
Stay ranged because those giants can kill with about 3 solid hits, or a single critical. And approaching them almost always gives them an attack of opportunity.
Just means you need to pump AC and acrobatics. But very seriously, this is not the AP to skimp on AC. And it’s super tempting to go gnome or dwarf for that +4 AC against giants.
Is there anyway to get sneak attack without going rogue?Vigilante with stalker specialization has something very close: Hidden strike, with 10d8 respective 10d4 by level 19.
Ninja is an alternative to regular rogue, with full sneak attack progression (10d6 at level 19) and a stronger focus on combat.
The assassin prestige class is a classic, and progresses as quickly as a rogue. That means 5d6 at level 9.
The brawler archetype snakebite striker starts with 1d6 at level 1, and makes it to 5d6 at level 20.
Slayer makes it to 5d6 also, but starts at level 3.
A bard with sandman archetype achieves 4d6 at level 20.Variant Multiclassing results in 4d6 at character level 19. It stacks with any sneak attack from regular classes.
The Accomplished Sneak Attacker feat boosts your progression by 1d6, but you need the class feature first and can't have more than 1d6 per 2 levels (rounded up) for it to work.From my gut feeling I missed some options.
The master spy prestige class gets 4d6 over 10 levels. But that class is all about subterfuge, not straight-up combat. Plus you can't start it before 8th level due to the skill prereq's.
I think it would help if you narrowed down what you meant by 'giant killer' since it could be anything from someone who can contribute to the party well in this AP to someone who can solo a giant in melee and win. The two things are quite different (although certainly possible) and being more precise will get you better advise.
I mean giant killer in the sense that I can kill a giant very effectively on my own