Get a Tetratronic Rippler deck, and keep upgrading it every time you have the mats.
Upload the queue in this order:
Sonic Shock (T3 -> T4 -> Iconic... it's a trade off though, Iconic is only 2 RAM but having the upload time increased to 2 sec on your first hack is pretty annoying)
Short Circuit (always upgrade for max damage)
Reboot Optics (never upgrade past T2, even the iconic one is no good compared to just paying 2 RAM for the newb version)
Synapse Burnout (always upgrade for max damage)
Sonic Shock at T3 prevents any trace back from happening, T4 also adds a cloaking effect to the enemy meaning that nobody is going to pay attention to the dude getting dropped. After a short while they'll notice the body though, not that it really matters. Short Circuit will kill almost anything when it lands because of how the Rippler deck works. Reboot Optics is for the deck effect to proc, and for elites/bosses that survive the Short Circuit. Synapse Burnout is the finisher for elites/bosses, late game it'll hit for like 30000. For everything else you pay less than half the cost to queue it, but it never actually goes off so the RAM is refunded PLUS you get 80% of the full cost back as well from Data Recycler.
Ping shouldn't be upgraded past T3 until you get Iconic. Not even sure T4 exists, I never got it or the crafting recipe. Duration does indeed suck ass until you get Iconic.
Other 3 slots are whatever you want. I use Contagion and Overheat, both upgraded to the best I could get. Iconic Contagion is busted though, it appears to be exactly the same as T5.
Target through walls only happens in two situations: you have Netrunner skill maxed all the way to 60 and then you can hack through cover while Overclock is active (the 10m range sucks though, and I can't actually get it to work ever so I think it's just bugged), and also you can hack enemy netrunners through walls when they try to hack you if you take the relevant perk. This actually does work, though arguably it's better to just use Self-Ice cyberware.
And speaking of things that don't actually work, I have never seen Spillover spread any hack. Generally I wouldn't want it to anyway, unless I was already in combat.
Bare minimum int perks look like this:
Enter the world of Cyberpunk 2077 — a storydriven, open world RPG of the dark future from CD PROJEKT RED, creators of The Witcher series of games.
www.cyberpunk.net
Endgame you'll want most but not all of the tree:
Enter the world of Cyberpunk 2077 — a storydriven, open world RPG of the dark future from CD PROJEKT RED, creators of The Witcher series of games.
www.cyberpunk.net
Monowire is gimped to hell now and the new relic gimmick for loading a quickhack into it is fairly useless too. Much better to take Body 15 and equip Gorilla Arms to pass all the Body 20 checks (and at L60 they are almost all 20s because of the scaling that got added for PL).
And one final tip for setting up your quickhacks. The menu when targeting an enemy is last in first out. So when you're assigning the hacks to the deck put in the 4 you rarely use first, then put in the combo above in reverse order and when you target an enemy you'll be able to just go 1-2-3-4 down the list.
Oh and just in case you play on console like me, worth noting that I have *never* seen an iconic quickhack drop. I had to xfer my save to PC and get the ones I needed most there from access points, then xfer the save back. On PC they start dropping at L55, and I'm not L60 yet so it's possible they will show up eventually on Xbox, but at least for now I'd be pretty screwed if I hadn't double-dipped the expansion.