"Realistic" would be grasping that we are involved in a war that is not going to end any time soon, with the most asymmetric foe ever faced, and having money thrown at us until we ask them to stop.
"Realistic" would be having Aircraft built/purchased specifically to project force anywhere we needed.
"Realistic" would be training the guts out of the entire CF, to turn us from 'peace-keepers' to counter-insurgency specialists.
"Realistic" would be churning out soldiers at a rate that would make the brooms in The Wizard's Apprentice look like pikers.
However, Canada has not been particularly "Realistic" in the past 30 years. We prefer to cower in our beds, while others protect us. Then we bite them in the back for doing so.
aahhh! That's better. Now, where were we? Oh yes.
At a minimum, we should have an entire BN group, with CS capabilities, per Regt, Airborne capable. With the ability to project and sustain them.
We should have those units practice jumping into Exercises together, so they get SOPs down, and become inter-changeable.
We should have those units practice supporting the boys at DHTC.
We should have those units train in conjunction with the mechanized units, so that they learn the capabilities of each other, and the weaknesses.
We should have those units work with those of the UK, the US, Australia, and New Zealand (mostly so I can meet Lucy Lawless).
We should, but we won't.