Personally I would leave the PRSA as is and not transfer the value, why I hear you ask? Your PRSA can be drawn down at any age over the age of 60 using current regulations where as your Occ pension has a set retirement date. So lets say that when you turn 60 you decide to retire you can surrender the PRSA and get your TFLS where as if you transfer the value into the scheme you will have to wait till normal retirement age. There are also other reasons as well to consider such as personal estate planning where this would be good idea.
I would take it that the pension's advisor advised you which funds were most suitable for your risk tolerance. I assume that you have a high risk to reward tolerance. The question that you ask is incomplete as we could advice you too go ahead and invest in up to 5 high risk funds, but what if there are all equity funds that are similar! My opinion on this subject (this is not advice) is to invest in a range of different assets such as a main equity index, emerging markets equity index, commodites index and bond index and perhaps property (UK property up about 5%YTD but there maybe trouble ahead) The % to invest in each of the above should be reviewed yearly especially as you get closer to retirement!
Just that you know that while Zurich managed funds performance has been exceptional in the past, it gives little indication to how it may perform in the future, it is also worth noting that managed funds rarely if ever, outperform the index that they are benchmarked against, managed funds usually have higher AMC than indexed funds so my advice this time is to invest in indexed funds and save money in charges and get the true market return!