Don’t take a bunch of stimulants while also using AAS because it’s going to further overdrive how hard the heart will working. Say you’re cutting - taking ephedrine or Clen prior to cardio will indeed further increase total caloric expenditure, but it is my OPINION that the extra heart stress isn’t worth it and the stims should be used after/away from the training window to generally raise metabolic rate the rest of the day. My wife gets fairly lean on diets with fairly low amounts of Clen and we always dose post workout, never prior, so we don’t risk overworking the heart. Plus training on Clen just sucks.
Also, if you do HIIT for cardio instead of milder forms like LISS, keep the duration to the usual 10-15 mins or whatever you’re used to. Don’t take Tren, feel your endurance drop like a rock, and then push your HIIT to 30 min sessions because you need more rest times to get the same work in, for example. Just do what you can in the normal time allotted.
If you want to increase daily and weekly cardio, build it up steadily as you earn the ability to handle it as you usually would. Guys box and fight all the time on gear, but they are already well-conditioned before adding gear - they don’t add AAS and suddenly try to do a lot more than they are used to.