@sabby_e17
Well, the Phalanx soul is needed to upgrade a Spear type of weapon +7 to a Scraping Spear, and Tower Knight's Soul is used to get the Warding spell from Sage Freke, which you need to release from 3-1 first.
Also, about the Long Bow, upgrading it to Quality Long Bow will make it less powerful than a Bow +4, but will even out the Strength and Dexterity bonuses. If you're going for a more Dexterity type of build, continue with the Bow +4.
Further along the game you'll get a Quality type of weapon which you can upgrade to Quality +5 in order to get the Trophy for it, so don't worry about not having a Quality weapon just yet.
Plus, when you get Spiderstones, don't use them on your Bow +6, wait until you have found the Compound Long Bow, in order to make the Sticky Compound Long Bow, when it reaches +5 and when you reach Dexterity >30, it'll be the best bow in the game.
Current PC Build
CPU - i7 8700K 3.7 GHz (4.7 GHz turbo) 6 cores OC'd to 5.2 GHz with Watercooling (Hydro Series H110i) | MB - Gigabyte Z370 HD3P ATX | Gigabyte GTX 1080ti Gaming OC BLACK 11G (1657 MHz Boost Core / 11010 MHz Memory) | RAM - Corsair DIMM 32GB DDR4, 2400 MHz | PSU - Corsair CX650M (80+ Bronze) 650W | Audio - Asus Essence STX II 7.1 | Monitor - Samsung U28E590D 4K UHD, Freesync, 1 ms, 60 Hz, 28"
