PCC Load Balancing (2 WAN PPPoE)
ISP1 - Download Speed: 1000 Mbps, Upload Speed: 500 Mbps
ISP2 - Download Speed: 1000 Mbps, Upload Speed: 500 Mbps

VLAN10 (10.10.10.0/24) 
VLAN20 (10.20.20.0/24) 

# 1. ALL LAN Address Lists
/ip firewall address-list
add address=10.10.10.0/24 list=LAN
add address=10.20.20.0/24 list=LAN

# 2. Create Route tables
  2.1. Routing > Tables
    For via-ISP1,
     - Press "+"
     - Name: via-ISP1
     - FIB: Check
     - Press "OK"
  2.2 Routing > Tables
    For via-ISP1,
     - Press "+"
     - Name: via-ISP1
     - FIB: Check
     - Press "OK"

# 3. Script PCC Load Balancing (2 WAN PPPoE)

/ip firewall mangle
add action=mark-routing chain=prerouting dst-address-list=!LAN new-routing-mark=via-ISP1 passthrough=yes per-connection-classifier=both-addresses-and-ports:2/0 src-address-list=LAN
add action=mark-routing chain=prerouting dst-address-list=!LAN new-routing-mark=via-ISP2 passthrough=yes per-connection-classifier=both-addresses-and-ports:2/1 src-address-list=LAN

OR

/ip firewall mangle
add action=mark-routing chain=prerouting dst-address-type=!local new-routing-mark=via-ISP1 passthrough=yes per-connection-classifier=both-addresses-and-ports:2/0 src-address-list=LAN
add action=mark-routing chain=prerouting dst-address-type=!local new-routing-mark=via-ISP2 passthrough=yes per-connection-classifier=both-addresses-and-ports:2/1 src-address-list=LAN

# 4. Create 2 routes to ISP1 and ISP2 with the mark routing that you have just created