First off... no on the mackinaw. Never use a mackinaw. I challenge you to give me one defensible reason to.

If you're mining in highsec, always use skiffs. Even a max yield fit skiff still boasts a 60k+ ehp tank which can discourage most small time ganking operations. As for the orca, you'll want to fit a solid tank for the same reason. You could probably work out an orca with decent drone yield but since I don't mine in HS I couldn't tell you how much of a target those are.

[Orca, Orca]
Damage Control II
Reinforced Bulkheads II

Large Shield Extender II
Large Shield Extender II
Adaptive Invulnerability Field II
Adaptive Invulnerability Field II
EM Ward Field II

Mining Foreman Burst II
Mining Foreman Burst II
Shield Command Burst II
Large Murky Compact Remote Shield Booster
Large Murky Compact Remote Shield Booster
Medium Murky Compact Remote Shield Booster

Large Transverse Bulkhead I
Large Transverse Bulkhead I
Large Transverse Bulkhead I


[Skiff, ♘ ICE]
Ice Harvester Upgrade II
Ice Harvester Upgrade II
Ice Harvester Upgrade II

Adaptive Invulnerability Field II
Adaptive Invulnerability Field II
Drone Navigation Computer II
EM Ward Amplifier II
Thermal Dissipation Amplifier II

Ice Harvester II
Ice Harvester II

Medium Processor Overclocking Unit I
Medium Ice Harvester Accelerator I


[Skiff, ♘ ORE]
Mining Laser Upgrade II
Mining Laser Upgrade II
Mining Laser Upgrade II

Adaptive Invulnerability Field II
Adaptive Invulnerability Field II
Drone Navigation Computer I
EM Ward Amplifier II
Thermal Dissipation Amplifier II

Modulated Strip Miner II
Modulated Strip Miner II

Medium Processor Overclocking Unit II
Medium Drone Mining Augmentor I