It's good for you both now and later to not touch SAs yet. SAs are only really useful when you have the stats to make their bonuses count. Are you boosting? If you're never going to boost then don't build for high levels like people here are saying, but still wait until level 25-30+ to put anything in SAs.
Your best way to get a good punter now is still to pump punting and confidence up high. Since it looks like you're not pumping punting anymore then keep going with confidence, though if you're boosting and really building for elite status at 40+ then you might want to put even more into punting until it costs 6 or 7 per point.
Most people give advice for boosters and late bloomer slowbuilds. I have lots of non-boosters and you definitely don't build the same way that people here will tell you if you don't boost. You'll be declining by your early 40s without boosts but going from level 30 to there will be about half your existence, so you still need to develop for effectiveness later to stay competitive then.