Much depends on the time that you have available to trade.
I only trade GBP/JPY and no other pair. That's just personal preference. The downside of trading this pair is the spread, which is approx 8 pts, although some SBs push this out to 14 (bandits!!). The 1 hr tf is a good place to start but, you will need a wider stop loss than if trading off a 5 min chart. Being a full time trader, I prefer to trade off the shorter tf. There are, usually, at least, one or two good trades to be found each day.
Fwiw, I have daily, 4 hr, 1 hr, 15 min, 5 min and 1 min charts running simultaneously.
I'm certain that FX53 can be applied to all forex pairs. It's essential to choose one, perhaps, two markets if trading on a short tf. However, there's no reason why you can't trade several pairs using the daily chart. There's one difficulty with running several charts; VT Trader gets slower and slower the more charts you add!!