It works! Thanks Cesare
Note for future readers of this post: here is a quick recap of mcs, jtag id and board config
E300ArtyDevKitFPGAChip.mcs
GitHub - sifive/freedom: Source files for SiFive's Freedom platforms
JTAG=0x20000913
BOARD=freedom-e300-arty
(See Freedom E300 MCS file not working - #5 by mwachs5)freedom-e310-arty-1-0-2.mcs
GitHub - sifive/freedom: Source files for SiFive's Freedom platforms
JTAG=0x10e31913
BOARD=freedom-e300-artysifive_coreip_E31_FPGA_Evaluation_v2p0_0.mcs
https://dev.sifive.com/dashboard/deliverables/sifive_e31_fpga_eval_kit_bitstream/releases/v2p0/download
JTAG=0x20000001
BOARD=coreplexip-e31-arty