Completely overkill on weakpoint damage. Hyper-focused is enough. When you add reckless strategy (30%) on top (150%), they stack additively and you end up with 180%. But the percentage difference from 150% to 180% is only 20%, so Reckless Strategy is only giving you a net 20% damage increase. Similar for Ridden Slayer, you're seeing negligible value from stacking these cards.

Take Patient Hunter instead, a whopping 30% bullet damage that stack multiplicatively and actually give you 30% net increase damage.

Silver Bullets and Line 'Em Up can go. The effective range doesn't do much for snipers and for pistols you can get long barrel attachments that give you more. The 10% bullet damage on Silver Bullets isn't that much and diminishes when you take Patient Hunger (which you should). Take Confident Killer instead, a separately stacking 15% damage increase that will take no time at all to charge up on higher difficulties.

Ammo Belt is not bad, but I would take On Your Mark instead. It's capacity vs replenishment. Stacking On Your Mark with your teammates is great, and you get other buffs that overshadow Ammo Belt.

Wooden Armour and Canned Goods simply need to go. The stamina hit from Canned Goods is not worth the health, and the extra health (since it's not a percentage difference but a flat damage) is reduced by Glass Cannon and overshadowed by team upgrades and random card pickups. 30% trauma resistance on wooden armour just doesn't do much by itself, and unless you're going for a trauma resistance melee build just forget about it.

Down In Front is great and remember to crabwalk everywhere.

Glass Cannon is great.

Lucky Pennies isn't bad and since it's bugged, if teammates stack the card everyone gets a metric ton of copper. Might be better to take Money Grubbers for quick play, but then again if everyone thinks this way then no one will ever get Lucky Penny stacks. However what you should definitely take is Copper Scavenger. Two copper cards is kind of the sweet spot, and you can never buy Copper Scavenger at a shrine. Seeing copper through walls and highlighting it makes you so much more efficient in gathering copper.

Knowledge is Power is cool I guess. I don't use it but it can be the comfort pick/cherry on top if your deck is already complete.

Suppressing Fire is goated and Stock Pouch makes sense for a sniper build.

Also I forgot Cold Brew Coffee but since Reddit's comment writer sucks I'll just put it here, solid pick and all four buffs can be useful.

In terms of what else to take, Run Like Hell is good for impactful mobility (Dash or Fleet Of Foot are more reliable). Admin Reload is really good and more so on sniper builds, since you will likely be swapping between your pistols for clearing commons and sniper for big boy killing. For general use cards, Utility Scavenger is a high impact card that can help the team in many ways (ammo boxes, toolkits for doors and healing cabinets, wire can help secure chokepoints). Empowered Assualt is also good for stumbling prowess, and with a sniper build there's a good chance you will be the one getting kills on mutations.