Sirin isn't in an amazing place. I don't think it's unplayable at all but compared to the other pacts def feels weak/limited.
Shrouded is a cool thematic passive though it doesn't add any combat benefit maybe add a dodge chance to it? Or enemies have a natural harder time aiming and hitting you scaling based on your points in it.
Pickpocket is great and feels like where a lot of the flavor comes from. It doesn't have huge combat benefit but since you can pickpocket health potions it's not useless for combat either.
Picktrix powder: this simply does not do as advertised the ability description claims that enemies you use it on will be vulnerable to sneak attacks but it's actually the opposite enemies become immune to sneak attacks while effected by picktrix powder. So I recommend fixing this bug.
Trick of the light: the clone taunt is insane inconsistent and it's damage and range feels that way too inconsistent as well. It's nice when it does work because unlike picktrix it actually does enable sneak attacks.
Glamour: a stealth ability is cool but this one is pretty limited and the only thing it really has is ability to be used in combat but you can be instantly knocked out of it. Also currently you can get a rune that is just glamour++ and you could us eit on a stronger pact like tethren or borimus. I'd recomend getting rid of some of it's limitations. Allow sprinting and jumping while glamoured. Give it an iframe when you cast it so you can't be instantly knocked out of it. And most importantly have it buff the damage of your next attack including sneak attacks/finishers (or just any attack so that it's not useless on enemies immune to sneak attacks).
On paper sirin wants to stack grace but the abilities don't benefit huge from it. Spirit is much more valuable. But even then. No stat really shines on this pact.
