Yeah, the window for dodging his attacks is really short. Your best best to have a go at him is when he's using innocence. You'll have to dodge the first slash before it comes out, so you'll have an opportunity to dodge the third and fourth which are the hardest ones to dodge. If you manage to do so, you'll have a small window where he's recovering from the lag of the attack to inflict some pain on him xD.
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"
