Waqa plays because despite being a shit-merkin against Penrith, the Raiders halves do not have those kind of kicks in them, and their kick chase and line speed is nothing like Penrith's, so there isn't the same level of pressure by a long shot.
Jakey will be picked, but like others I'd be advocating another forward on the bench, Raiders big men will challenge ours and even if we are on top fatigue will be a factor, another body to throw in the middle to reduce minutes as an option would be a plus. On top of which, should we win we are headed to play a game in conditions that will really push the big guys hard the following week. Having the option to give them less minutes should the game allow would again be advantageous.
If Moses doesn't play it's all moot, we'll need every other merkin to be at their best, and Jakey has to be there 'cause despite his kicking game not being great it's gonna be better than any other player we can name, and kicking will be super important. We don't wanna be relying on Gutho / Drown / Rheed to pick up the slack, their long kicks aren't good enough and you need to have the options either side of the ruck. I'd also prefer Drown to be in the kick chase rather than kicking, 'cause he's far less likely to be beaten one on one by a back on kick return.