Wow, a truly impressive reply; I'm glad I took the time to write back to you earlier.
No, you can't salvage spells and in a while you won't want or need to because with a refined workbench and your insight/charisma gear you'll try your hand at fishing (ignoring/butchering all the fish into nothingness) and/or digging up a beach-map (you can only fall down a tripple dug hole once per map, so even if you get hurt, it wont happen again on that beach), crafting crystal from sand (and then crafting every last recipe you can in crystal just to level up your recipes so that you could do them with steel next), and getting a good number of runes from there. There are some numbers in the guide from my experiment -- good returns and i have multiples of everything from there.
You might want to look at the Jade faction traits and see if you can boost your luck while also aiming for attunement and diplomat as I have done. Rather than going into dungeons, and i might have worded that warning too strongly because they are very fun as you have experienced .. if you can get out that is, and that is tricky because you've not the half of how devious they are yet! ... I'd want you to farm points and key-fragments by killing as many Jade Nobles as you can. Seriously. become an attuned diplomat, hunt the castles, put up an airtight 5x5 shelter around you and the noble, kill them, get the fragment and move on.
... do this in the Relica area as soon as you can handle the normal quests from a little further out and have your never-any-repairs needed stout or deadly pets. Invest the 9th fragment into your character and repeat that a few dozen times before you actually complete the key -- which will only give you temp weapons on demand that make some fights go faster but which have not been essential for me. you'll also start having to worry about sleeping with the door locked after that 'win' and farming the 9th fragment while still staying the hell out of champion fights for a while longer and picking up as many labyrinths as you can is easy and gives you the most points! you'll find plenty of castles within 20..80 miles from relica to up both your insight and stamina while loosing the least reputation with your faction since you'll make 1 instead of 10ish kills per fragment.
I do believe charm matters a lot with rewards, yes. Rearranging relica with a pick-axe and some paint so you can do multiple find-item quests right away is fun. I'd not keep my stash in relica but allow myself the extra time/encounters and stash at your 2nd or most distant other settlement, transfering items through the warehouse and looking around for next tier mines and npcs while you're out there.
Experiment with which waypoint connections/direction dump you into a lake and which don't. and keep fighting your own faction's nobles, donating a medal here and there to make up for lost rep if you want to keep it; or just buy the remaining trait manuals and plan on which faction you want to do that with next. at least you'll no longer be worried about your health stat at this point!
you can /name npc you meet to encode what they are and what they can do for you. /slw their positions in town, complete a den and pick as many good mercs as you want -- careful to not trash their items, they dont seem to like that -- and park at them at your base away from relica. ... as you do all this you will start collecting quite a few legendary items. and with these you can build different sets, and figure out how to get your elemental alignments up high. boy, that was a long-winded way of saying, yep, attunement is that important, and that's why you want gear that lets you infuse runes.
ropes.. from plant-fibers. can't have enough of them ;) ok.. you will have more than enough; of everything. storages seem unlimited, but put no more items into them as fit on the screen and you'll have the mechanics down. keep looking into the local maps as you travel, there are quite a few mysteries in there, some of them quite rare, others quite puzzling.
"(d.) do NOT combine Condition effector runes with the Elemental rune." .. beautiful insight; I wish I understood how the elemental became an AOE rather than a Direct Damage Dealer.. If not at the beach, you'll be able to obtain runes from the staff when you complete your first obelisk. Its not the right spell for my Gatekeeper; if you learn more, lmk.
I'm looking for another gatekeeper to gear up in legendaries to take into dungeons with me and the magic DD's i'm hoping to hire in taverns from around the realm. 'our' stuff only takes half the damage and I don't mind shield-bashing mobs and playing 'a dummy' this time 'round ;) See you at the rift!