Given the coolant loss I wouldn’t do another thing until I checked the compression. If its found to be low you’d want a leakdown test the see about the head gasket. Quicker/easier checks might be a block tester and/or a vacuum gauge.
Aside from that I saw no reference to new wires to go with those new plugs & coil packs.
You also need to check out the fuel system - fuel pressure & the fuel pressure regulator at minimum.