This is just my opinion:

Cruise = Dependent on your size and development, highest possible AAS dosage whilst allowing bloodwork values to return to normal. This will obviously vary from person to person, but some individuals can cruise on 400mg weekly and have lipids etc be fine whilst others need to be lower at around 250mg. Cruising is also dependent on your goals, if you compete cruising is kept to a minimum and really only is needed when health becomes a concern/ body needs a break, otherwise its just off season/ contest prep blasts. Most recreational AAS users can get away with a test only cruise, personally I like to add Masteron in at a low dose for its properties. Others add Primo or low dose NPP/Deca. Primo for the look it brings and Nandrolone for the joint health. Cruising is NOT the same as TRT, I see alot of people make this mistake. Cruising is dropping to a dosage that allows you to retain muscle mass whilst taking a physical or mental break, and as i've said above should be determined by your goals. TRT is obviously a doctor determined dosage to support normal function as a healthy male, muscle retention/appearance is not the primary concern. As you get bigger your cruise dosage will have to increase also, in order to support the level of muscle mass you have.

Blasting = Specifically what blast you choose is completely down to what you are using AAS for. Very simply put (without concern for GH/Slin);
Bulking: Test + Deca + Dbol. If you respond poorly to Nandrolone substitute it for EQ.
Cutting: Test + Tren + Mast. Test stays low, Tren and Mast bring a harder, drier look. Tren is hugely anabolic so allows you to run a big caloric deficit and retain muscle

Obviously this is massively simplified, but as a starting point thats how most blasts are designed. You'll have to read around to learn about what compounds/dosages are suited to your goals.

Blast length varies, its a balance between monitoring health and blasting for long enough to make the progress you need to.

Hope this helps