You know an interesting way to gain a lot of sp in SU using ult's without Sparkle? Get the Elation buff that turns ults into follow up attacks, get the gain sp Elation buff with every follow-up attack, and as many Erudition buffs and boom. Golden and f2p friendly really.
Build him for speed and break effect. Boots should be set as speed and planar rope should be set as Break effect. Have boothill be played with Talia and get him to 145 speed before focusing on break effect. Crit and attack are useless to Boothill so you mainly have to prioritize substats instead of main stats for everything(since main stats are basically useless). If you don't have Boothill's signature and need a f2p option, use s5 3 star adversarial, since more speed is equal to more turns which is equal to more break which is equal to more damage(unironically it outscales all other options, including other 5 star limited hunt light cones). As for relic set, it's best to wait until 2.3 when the new relic set is released because that set will benefit Boothill the most. Hope this helps!
Damn gonna have a pass on Boothill on this one. I did try to pull for him (with 2 Good Lookin songs which are Dixon Dallas and the other song Boothill and Dan Heng Eng Va) I bet myself that if I get him I’ll skip firefly but if I lose I’ll get firefly. Looks like I lost :(. Good luck to you all Boothill havers, play Good Lookin for good luck 😂😂😂😂