> * Instant L20s to park at jumping puzzles to farm silver doubloons
This is the only one you listed that can actually benefit from the instant 20 levels. However, I'm not that interested in doing this. I've already got 1 level 20ish character parked at a JP, and I am not about to buy extra toon slots to do more of this.
Sorry, but you do not need a level 20 for this. Also, mining the nodes in the home instance is account bound. I can easily hit them once per day with one of my existing toons
Yes, you do need L20: Upgrading quartz is only available for L10+ characters
Steel havesting tools require level 20 and you need them to take advantage of advanced gathering nodes.
Having character right at extrance of instance gives some benefits (less travelling, no inconvenient park location for your L80)
At the current time, it's simple enough to key farm with a starting toon. There is no need to level them to 20 to do this. I can quickly complete a key run w/o dying or even getting downed with a new toon that tends to wind up around 5th level by the end of the key run. In the future this may change, but then again key farming as a whole may not even be viable with the upcoming changes.
Efficient farms provide lower difficulty with greater yields.
I don't need more skill points. I've already got about 2 stacks of the single point skill point scrolls, and I end up finding more of them faster than I ever need to use them (like polishing off a daily). I always gain more than enough skill points for the monthly by just playing the game normally (events, guild missions, killing stuff, harvesting, etc). My main character has over 1000 sp's banked up as well, so it's not like I'm lacking for these. At this point, I also have no need for upgrading mats, upgrading siege or making more augur stones.
Here, I can echo "LOL!"
If you are drowning in skill points and have "no need for..." any of their sinks or cash conversion, you automatically loose right to complain about abundance of them - you are hoarding stuff you are not going to use. Why? Just blow them up on some forged stuff for nice profit.
Besides, not everyone is farming champions or farming experience to experience such overflow.
Why LOL then? Yes, Experience Scrolls are usefull - too bad you are not taking advantage of them. But other people are.