Fucking Weeaboo
Yeah, as 12.5% chance is tough. An alternate place to get SpiralClaw is in Mine Your Own Business, but that's after a boss fight and several other fights (there's two Narcissos east of the save point in Ulkan Mines). Ultimately though, you want it ASAP from that Ape Mummy.
But what's worse? The route I'm using now for Dragon (J) (based upon the Japanese TAS) goes after Doom Hammer (ATK 49!) in The Fallen Emperor which is a Lv 5 slot, meaning a 6.25% drop. The Japanese RTA (from the #3 guy, the fastest one I can find video for) I believe still farms for GigasGloves (ATK 35) in Guardian of Winds though (12.5% from Narcissos).
But what's worse? The route I'm using now for Dragon (J) (based upon the Japanese TAS) goes after Doom Hammer (ATK 49!) in The Fallen Emperor which is a Lv 5 slot, meaning a 6.25% drop. The Japanese RTA (from the #3 guy, the fastest one I can find video for) I believe still farms for GigasGloves (ATK 35) in Guardian of Winds though (12.5% from Narcissos).