Similar situation here too, FWIW. I spend roughly 65% CAD, 25% EUR, 10% USD in a typical year.
I just use the cash markets. I keep my net currency roughly in proportion to how I spend it, buy/sell in cash markets to rebalance occasionally (a few times a year, usually) and don't spend too much time worrying about it.
When I'm agnostic toward the future directions of currencies, I assume their movements won't impact my portfolio too much in the long term anyway (just noise). When I have a tradeable opinion on the direction a currency will move, then of course I trade it (usually using futures or options), but that's off-topic because it's speculative, not hedging. This would be different for someone who doesn't include currencies in their universe of assets to predict and trade (maybe they would care more about hedging because they wouldn't be "on alert" for big moves.)
Note that I rarely come close to having to worry about margin, so I don't have any constraints there. Someone else's situation could be different. Also, I usually have a considerable number of shorts balancing my longs, which helps, although not always.
I also hold some options-hedged crypto positions (speculative), but not enough to care if I lose it all (yet enough to be happy if my models work.) Unlike most people in 2022, I do occasionally spend crypto to buy things and I do plan to do more of that in the future as opportunities permit. I'm already "over-allocated" to crypto from a hedging perspective (because it's speculative), but 10 years from now my spendings ratios may change considerably. We'll see.
