[Hectic]

So then the easiest answer is the left, and OD with TW and Khaki with AR.
No need for additional flags (like the IR). Unless of course you plan on nightops where you may need the IR, in that case it can go right and the left one stays, altho i think you can just swap the left one out for IR but Id let someone else confirm that.
Also as far as i can tell most of those special forces types are given alot more freedom of choice when it come to their gear, and alot of the available photos will show them without flags on the arms at all, and often with just the IR flag in the right or on the back. A quick google of CANSOFCOM and lookin at images you can see alot of different placements.