The easiest to spam is the Courier, deliver at Ceizak, spam every 3 days for 15 tag, 5 runs. You can also farm bloodthread from Uglyrange Abusea, make 3-4 stacks and spam the inventor coalition, gather rala waterways. Also sign up to Ceizak Clear on Pioneer's Coalition. Look at the quests, see which one is repeatable and spam those as well. You may have to farm a few things.
There are several things you must do, non negotiable lol.
1. See if you have support jobs leveled, you need at least one or two. Bard and Corsair are good to have. Make sure they are well geared and your bard must have at least 350 singing skills and Abusea AF3+1 gears at the very basic. Red Mage is also good, but you have to really gear your red mage to the max, so may be a bit too much work.
2. Try to level healer jobs, and master this, but if you hate healing and do not understand what WHM does on endgame, maybe don't bother.
3. You can also focus to work as stunlock scholar. This is a lot of works though, you have to do several of the older contents to gear your stun set gears.
3B. You should finish the main missions of older content, some do have good accessories that are still valid. You should also try to fully experience Neo Nyzul and Meeble Burrow, they have some good gears even by SoA standards.
4. IF you cannot do list 1-3, in case you play DD only.... You can farm bayld by joining those bayld farm party, each run should net you 30k bayld, so if you are doing multi runs, can get 90k in an hour. USE this to buy your level 106 gears. Augment those as well. Then see if you can do skirmish but you fight the mobs to get those skirmish weapons. The Skirmish II sets will have comparable slightly less damage than delve weapons. Some weapons may have higher based damage than delve weapons. But if you have level 95-99 R/M/E weapons, you should be fine if joining pick up group plasm farm.
5. You do want to farm bayld regularly, by doing the skirmish bayld farm, skirmish weapon+spells farm to sell (geo spells are 200k). You should make old school party set up and go explore colonization reive in Marjami and Yorcia as well, Morimar and Foret. Get those nice pop up items to sell for good money.
6. If you are rich, just buy those level 110 and up craftable weapons at AH. With that weapon and your level 106 augmented gears, and AF3+2 or some Relic +2, you can come as DD (or mage or support) and join delve plasm farm.
7. Get ready to pull your hair out and curse people.... So many newbies have absolutely no clue on what it means to work together in a group, they end up ruining your run and wasting your time because they just want to do delve but do absolutely nothing in gearing and at least knowing their roles + jobs and following leader instruction. The good players will learn fast in 2-3 runs, the decent one will take 10 runs or more. The bad ones, you may as well black list these, they just want to leech and slow down your run, instead of the acceptable 7k per run, you get 3-4k due to massive wiping, sometimes 200-500 plasm due to wipe at start lol.