2x half weighted works fine for me for price appreciation ... PV
Dividends ... and SWR drawn from total returns works great. 4% SWR = 4% of the initial portfolio value drawn as a DIY 'dividend', increase that amount each year by inflation as the amount drawn in subsequent years = regular inflation adjusted income/dividend
Yearly rebalancing back to 50/50 is a reasonable add-low/reduce-high mechanical trading method.
Yes the expense ratio is high, but when just 50% weighted that cost is more acceptable.
Another benefit is that when paired with physical in-hand gold, then total portfolio counter-party risk is reduced.
For 3x, just scale down the weighting to a third ... PV