If your field point arrows aren't tuned,you not only will lose a ton of penetration but your broadhead arrows won't even impact in the same place as your practice arrows.There is no such thing as good enough,with tuning.
With that arrow spine,length and point weight,your arrows are way weak.If those arrows were cut to 30",you could probably shoot a 145 gr point.Cut to 29",you might be able to shoot a 175 gr.I doubt if 200 grs would work unless you switched to 5575 shafts.
Go to bowmaker.net and read the tuning information and follow it to the letter.