Everyone is Goliath when you're a Halfling named David (Sling Build advice)

[Dreadmad]

Hi all!

I'm going to be starting a Mummy's Mask campaign with 3 others, and after their builds were planned out I realised my initial offering was pretty defunct. I need to bring Divine Spell casting and some sort of ranged damage, so I think I'm going to go with a Warpriest Sling build.

I was considering dipping a level of Fighter so I can get Precise Shot at level 1 but I don't think it's worthwhile to lose the progression of Spells/class features.

Halfling Arsenal Chaplain Warpriest

Traits: Fate's Favoured (plus something else, likely reactionary)

Stats: 13/18/14/12/13/13 (Stats are 16 down to 11, +1 STR at 4, +1 DEX at 8 & 12, +1 WIS at 16)

Feats:

1 - Point Blank Shot, Weapon Focus (Sling)
3 - Startoss Shower, Startoss Comet
5 - Slipslinger Style (switch over to a slingstaff here)
6 - Weapon Style Mastery
7 - Rapid Shot
9 - Clustered Shots, Weapon Specialisation

I think I can get away without taking Rapid Shot until I'm getting towards my iterative attack at 8 and just rely on taking an attack at 2 separate targets using Startoss Comet (downside being I can't funnel damage, but advantage being not taking the -2 to hit from Rapid Shot).

The plan is to stack flat damage (Slipslinger & Startoss Shower styles, Weapon Specialisation, Divine Favour, Weapon Training, Gloves of Dueling, Trained Throw etc) and go from there. Obviously it's a bit of a pain spending a swift action to activate my styles when I also want to be fervor buffing myself - but such is life for a less optimal weapon choice.

I also intend to buy some Boulder Bullets and pair with Vital Strike for some burst, but that can wait until later down the line.

[VoodistMonk]

You can't use Slipslinger Style and Startoss Style together without a specific ability to fuse styles.

Weapon Master Fighter 3 is my favorite way into Slipslinger Style... then go into Grenadier Alchemist, or something like Sohei or FarStrike Monk.

Usually start with this:
Halfling
-2 Str, +2 Dex, +2 Cha
... Warslinger replaces Sure-Footed

15pt buy (w/ racials):
10,16,14,10,14,10
20pt buy (w/ racials):
12,17,14,10,14,10
25pt buy (w/ racials):
12,19,14,11,14,9

1(class): Weapon Focus Sling
1(level): Point Blank Shot

2. Weapon Guard
2(class): Arc Slinger

3. Weapon Training 1
3(level): Slipslinger Style

To attack:
+3 BAB +1 Size +1 WF +1 PBS +1 WT +3 Dex

To damage:
+1 PBS +1 WT + Str

BAB +3
Base saves:
+3/+1/+1

Saves (with stats & racials):
15pt: +6/+5/+4 (+2 vs fear)
20pt: +6/+5/+4 (+2 vs fear)
25pt: +6/+6/+4 (+2 vs fear)

Stats for continuing into Alchemist:
15pt buy (w/ racials):
10,16,13,15,12,9
20pt buy (w/ racials):
12,16,14,15,12,9
25pt buy (w/ racials):
12,17,14,16,12,9