The trend of gbp/jpy has been a slow trend upward, with waves that are structured. The movements in GBP/JPY dictate the movements.

The options are to await the minimal stage at the wave cycle of GBP/JPY to go into trades long in GBP/USD and USD/JPY, effectively taking USD out of the film.

If your bullish on GBP/JPY

1) long gbp/jpy outright
2) long equal usd amounts of GBP/USD and USD/JPY

If bearish on GBP/JPY

1) brief gbp/jpy
2) brief gbp/usd and brief usd/jpy equal amounts

At any moment in time: GBP/JPY is trading in 218.09
if you believe its heading to get support in 216.16, play with the above trades.