Yes, based on the results you're seeking.
How much is the blast? well, how much is your TRT?
You should blast & cruise if you're staying on TRT for a long time.
I would recommend at least 250mg/weekly for 12 weeks if it's your first blast. assess your gains, sides, mood etc. and from there you will have a better understanding of how your body reacts to steroids dosage higher than TRT

Dep3nds on you goal each compound work diferet some are more to gain mass some with mpre water retention like deca and somw.with less water retention like equipose or npp ,another more to cutting and polish like tren ace and masteron, the watee retention are less on sters propionate just need to be inject Every other day

Test Cyp 400mg/week (200 mg twice a week), based on the information you've provided.

You got it bro. Yes that a great place to start off. --

Brother, Considering your TRT and previous Anavar experience. It's good you're thinking about pre-cycle blood work—absolutely essential.
About the cycle:
You're right, it's not just about results, although that's a big part. It's a combination of factors:
Experience Level: You've done an Anavar cycle, so you're not a complete newbie. This allows for slightly more advanced options.
Goals: What are you really after? Pure strength? Size? A recomp? Anavar is great for strength and cutting, less so for massive gains.
You have access to Deca and Anavar. Deca is a classic mass builder, but has its own considerations. Of course you can add anything UGL. But thinking about those you already got in hands...
Do you consider yourself healthy? Let's say all your markers seem good and you appear to feel ok—which is good, but blood work is the objective measure. You must to look at lipids, liver/kidney function, etc., before making any decisions. TRT for 10 years means you're likely stable, but still needs checking.
Being on TRT changes the game. You could blast and cruise, but it's not the only option. You can also look at adding compounds to your existing TRT.
Main Question is Blast and Cruise vs. Adding to TRT:
Blast and Cruise: This involves periods of higher doses (the "blast") followed by returning to your TRT dose (the "cruise"). It's good for maximizing gains but has more potential for side effects; you probably already know that.
Adding to TRT: This involves keeping your TRT stable and adding other compounds for a set period. It's often a good starting point for those already on TRT, especially with compounds like Anavar.
Since you've done Anavar, and you have Deca available, here's a possible approach (remember, labs are key):
Pre-Cycle Labs: Full blood panel, including lipids, liver/kidney function, testosterone (total and free), estradiol (sensitive), prolactin, PSA.
Consider a "Cruise" with Deca and Anavar: Instead of a full blast, you could add a low dose of Deca to your TRT alongside another Anavar cycle. This allows you to assess tolerance and response.
Deca: Start very conservatively, perhaps 100mg/week, split into two doses. Deca can cause issues if you're not careful.
Anavar: You tolerated 48mg ED well before, so you could consider that again, or even a slight increase (50-60mg ED), depending on your goals.
8-12 weeks is a common range.
Your current Anastrozole dose seems low given your estradiol. However, never adjust AI based on how you "feel." Estradiol is the only reliable indicator.
During Cycle: Monitor estradiol. If you get symptoms of high E2 (sensitive nipples, water retention), adjust the AI based on labs. Don't just blindly increase it.
Post-Cycle: Estradiol often rebounds. Have labs done and adjust AI as needed.
Important Considerations about 19nor Deca:
Deca and Prolactin: Deca can raise prolactin. Have it checked mid-cycle and consider a dopamine agonist (like Cabergoline) if it's elevated.
Deca and Libido: Deca can sometimes negatively impact libido. This is another reason to keep the dose conservative, especially at first.
Cardiovascular Health: Monitor blood pressure and lipids, especially with Deca.
PCT I wouldn't care about as long as you come back to your TRT dose later on.
So...
Get those labs done!
Based on the labs and what kind of markers you are prone to, we can fine-tune the cycle.
For example, if you have a family history of high cholesterol and already saw this in your own bloodwork, I would recommend staying away from Stanozolol. On the other hand, if you’re prone to elevated hematocrit levels even before starting TRT or any other treatments, it’s best to avoid compounds like boldenone. These factors should definitely be taken into account.
Well-dieting and training. No cycle will work optimally without these dialed in.
Don't rush into anything. Slow and steady wins the race in this game. That's just my 2 cents, brother.

If you havent cycled before simple 600test and 25mg provi. 12 weeks. Provi week 4 til end. You need to know estro control etc before gaining boobs and leaky nipples. Blood test end week 4. Ai on hand as/if needed

Testosterone : 300–500mg/week
Deca-Durabolin: 250–400mg/week
Since you’re on TRT, you’ll just taper back to your TRT dose after the blast.