With the HPPC we can now deliver 30 pin point damage at extreme range. 3x Small Lasers and 2 MGs provide close range damage where the HPPC is less effective.
Compare with the LPPC variant, and take the PPC Poll! TDR-9S "Chain Lightning" (6x LPPC, 2x HMG,AMS, LE300) https://www.mechspecs.com/threads/tdr-9s-chain-lightning-6x-lppc-2x-hmg-ams-le300.12933/