I wish you would have asked before dumping lucas in there, lubegard biotech would have been a better choice. At this point, you should dump it. If you read my oil filter thread, you can see spun microglass filters can out last any oil. So in your case it would be appropriate to do an extended interval, I have done a one and two year interval with used oil analysis's, "uoa". Even at 2 years and 10k miles, my tbn was over 3,0, meaning I could have gone longer, tbn is the main thing you use to set a long interval. I cut my oil filters open x3, royal purple like new at 12 mos, 14 mos, and 2 years, it will outlast any oil imo.
If you use the truck a lot, you can probably save the uoa money and go the 10k miles, but ideally you would want a uoa. Another good thing about a uoa is it will tell you how the engine is wearing, if there is heavy wear it will show up, meaning that cam has been worn more then average. If you order a uoa, get tbn it is an extra charge. Nobody knows how long a truck can tick before losing the cam, literally it could be any day, or last a decade, we have had both and everything inbetween.
If you are really struggling at 10k miles money wise, you can even add a pint bgmoa at the 10k mile mark and drive another couple thousand miles, it is a tbn booster. I would however not push it too far without a uoa, nothing over 12k with bgmoa at the end of the interval.
2012 you want 5w30 no doubt, later on you can choose between 0w30 redline or 5w30 redline if you want more cold performance try the 0w30. But in this situation you should go straight to 5w30 at first, that is the most proven formula. It can take 500-1500 miles for truck to go silent, or right away, that is the science and experiences are all over the board. It has been so successful you can almost say if it doesn't alleviate the tick it perhaps isn't internal. I would at a minimum expect an internal tick would be different in cadence and noise level.
The worry with hemi tick is warm idle tick, if you upload a youtube with the recording device taking from underneath engine and a good 3 minutes plus, we can sometimes have a good guess at what is going on. Do one before you try redline, and then after, again when truck is warm and at idle. Knock wood the good news is if we get that tick killed it will very likely add life to that cam, the decade we have been doing this nobody has had a redline engine cam fail that wasn't going to fail before redline. There were a couple fails, but both of thosegyus had codes and mechanics saying the cam needed replacement. You are not there until you get the p0300 range mis fire codes. Good luck with it, keep us in the loop. 5w30 redline and a royal purple 20-820 filter.