@DOLBYdigital
Your best bet against multiple geckos is to use the Wrath of God miracle, since it's an AOE miracle that does decent damage to them. If you don't have much Faith, but have Magic and Intelligence for it, Firestorm is a decent substitute.
In my first NG, I usually just snipped each one individually, with that method I even got all C.G in 2-2 with just one of them dissapearing.
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"
