Great job in the video there.
You may notice slight improvements in strength from increasing the tren, but don't expect anything significant. Just 350 mg of tren is already providing the androgenic equivalent of about 1,750 mg of testosterone, which is quite a bit. You are alos currently using 500 mg of test...no to mention the 140 mg of Halo per week, which provides the androgenic equivalent of 2,240 mg test/week (halo is 16X an androgenic, per mg).
Steroids increase contractile ablity through more than androgenic stimulation. This is why drugs ike Anavar can increase strength fairly well, despite providing very little androgenic stimulation....and SD, which is as weak Anavar (androgenically speaking), but causes tremendous strength gains in most users. If you are able to stay wthin weight limits at the meet, the following cycle should serve you much better than simply increasing the Tren & and Halo(although I do think the Halo should be increased for ure--more on that in a minute).
As long as you are able to stay within weight limits, the best strength gains will result from attacking strength through as many mechanisms as possible. The body need to be exposed to halo for at least 4 weeks to maximize contractile ability at any given dose....although 3 weeks will probably get you 90+% of the way there. This does not mean strength gains cease after 4 weeks, obviously, as you can continue getting stringer for years. It simply means the steroid's ability to enhance muscle contraction will be in full effect by that point in time. For that reason, I would advise running as much as you can at least the last 3 weeks, rather than running 20 mg until the final week and then increasing the dose to 50-60 mg at the last second. The body won't have enough time to maximally respond to the increased dose within just 7 days.
For someone at your weight, especially when usingall that halo, I don't see any need to go above 500 mg/week...and just like Halo, I would increase the dose as much as you can at least 3 weeks out, instead of ramping it way up at the very end. by using Test, tren, and Halo at those dosages, you will be providing your body with more than enough androgenic stimulation.
Again, if you can stay within weight limits, you will make better strength gains by adding other steroids into the mix. Some of the DHT-based steroids, none of which you are currently using (which is a mistake), can provide excellent gains in strength and appear to increase strength through different mechanisms than many other non-DHT based steroids, as demonstrated by the fact that some of them are very weak androgens, yet cause tremendous increases in contractile ability. Although personal response can vary, I would say the largest number of people will have the greatest success with Superdrol. I have experimented with many different combination of AAS for strength gains in both myself and numerous clients (2 of them pro strongmen), I have found SD & Halo to be the best combination of oral steroids for strength gains. For those people who have issues with SD, Anadrol is usually the best alternative....in most cases. As far as conventional injectables go, testosterone & trenbolone are hard to beat.
In addition to directly increasing contrctile ability, another reason DHT-based steroids like SD & Anadrol cause significant increases in strength is because of their ability to enhance leverage through muscle swelling. These drugs inhibit the 11-beta-hydroxylase enzyme, which cause the muscle to hold a lot of water. Since this water is intrasmucular and not sub-q (although some sub-q water may result, especially with Drol), they directly increase muscle size and a result, leverage. I have seen crazy strength gains in a short period of time with people using SD alone.
The following program would likely work very well for you:
Final 3-4 weeks
Test prop @ 500 mg/week
Tren ace @ 500 mg/week.
SD @ 30 mg/day.
Halo @ 30 mg/day.
You might want to consider a cycle support prodct like Advanced Cycle Support, simply because you will be combining 2 tough orals.