Pay monthly with a fixed dpu of $0.06 for AM. Predictable payout amount, but u must be ok the UT price almost will never exceed it launch price, pure dividend play.
if you want moderate capital appreciation + monthly variable dividend, choose AMg, slightly lower dividend but you will see UT price increase over time.
you can do RSP but is good to diversify to some Sg reits. you want to mix high dividend yield and dividend growth element in your portfolio.
High dividend yield rack up passive income very fast, short term, but over long term (20years) dividend growth rate is an more important factor.