500S-Cybergenic Powercore

If you're farming [item=168327] for e.g. [item=167751] which summons the X-995 Mechanocat, or for rings such as [item=169113], the rare mobs that drop it, and the associated drop rates are shown within the TomTom and Paste* coordinates below.

/way Mechagon 56.2 59.2 Enforcer KX-T57 - 67% Chain Igniter coil
/way Mechagon 40.8 29.8 Killsaw - 65% Chain Igniter coil
/way Mechagon 61.8 41.8 Malfunctioning Beastbot - Needs activating - 61% Chain Igniter coil
/way Mechagon 66.51 51.82 Gear Checker Cogstar - NB MULTIPLE SPAWN POINTS - 55% Chain Igniter coil
/way Mechagon 60.8 61.4 Mr. Fixthis - 54% Chain Igniter coil
/way Mechagon 82.6 77.4 Scrapclaw - at bottom of sea 50% Chain Igniter coil
/way Mechagon 52.2 40.6 Arachnoid Harvester - W of Bondo's Yard - 46% Chain Igniter coil
/way Mechagon 76.4 44.0 Jawbreaker - 46% Chain Igniter coil
/way Mechagon 57.0 53.8 Mechagonian Nullifier 46% Chain Igniter coil
/way Mechagon 87.63 21.31 Mecharantula 29% Chain Igniter coil

*Paste is an addon that allows pasting of chunks of macro text