I've been pretty vocal about getting Napa if he is cheap (this is the key point) and I stick to it. I'd also love to get Lui and would be really happy to get both to be honest.
I can absolutely see the concerns with Napa and to be honest, wouldn't be too sad if we missed out on him but he would be an excellent foil for Haas. He'd be coming to the club to not be the main man. You could just tell him to go out make runs, make tackles and nothing more. The first brain snap he has, he's back to ressies. I also wouldn't be signing him for long, 1 or 2 years at most. If he wants longer, you walk away. In fact, I'd make that second year a club option only. If he is willing to agree to these terms, he may well be worth pursuing. If he isn't, see ya later.