Overview
SAA is a supportive handgun with tiles that buff damage by 25% and accuracy by 50% in a cross shape around her. Her skill buffs damage by 22% for 8 seconds, with a 6s ICD and 12s CD.
As with most handguns, we are interested in her tiles and skill, as handguns typically don't do too much damage on their own.
While you wouldn't normally use her to tank, she can take a few hits. Her EVA, while lower than average, is higher than Calico's, who I'm sure many of you have experience tanking with. Her HP is high for a handgun, other HGs sharing her HP include Welrod and Jill.
When we look at her tiles and skill, there are other handguns that can go on position 4 and give more damage. SAA's most direct comparison is K5, who gives more damage, while also potentially providing evasion to your main tank. K5 trades this for providing less accuracy and being less mobile, as allies have to be on K5's tiles for her skill to work. Other options like Grizzly and Jill provide larger increases to damage. With that said, SAA isn't a bad handgun by any means. Damage and accuracy are both good stats that you want more of, and she gives a good amount of both.
Overall, while SAA may not generally be your first choice when thinking of a supportive handgun, she's good.
Pros
Desirable buffs
SAA's damage and accuracy buffs are two of the most commonly sought after stats to buff.
Cons
Comparable options are generally better
While SAA brings things her competition doesn't, she has competition that brings utility that's better suited for general use, like higher damage tiles and skills.
Full analysis
SAA is a decent choice when you're looking for damage buffing options. However, when players don't need her accuracy buff, there are better choices when it comes to directly buffing damage.
However, accuracy buffs are not meant to be understated, and she gives the most accuracy to ARs and RFs of all options that provide a combination of damage and accuracy. In later content, players will encounter enemies in night maps with higher evasion, that you really need accuracy buffs for.
Due to being one of the few options that buffs both damage and accuracy, SAA is a good choice for general use, and amazing against enemies with higher evasion.