Might be semantics but technically your blast is your high dose time and your cruise is you low dose time. So by that definition you could choose to cruise on 200test and 600eq and blast with 800test and 600 eq.
If you were asking if this is recommended then I'd have to give a big fat no.
Its true that if you choose blast runs of 8-10 weeks and cruise runs of 4-6 weeks that eq becomes less than ideal to run for as little as 8 weeks but by all means you can still do it or maybe stretch it out to 10. An issue though is give the ester of eq even if you ran 10 weeks there will still be plenty of eq in your body in weeks 11 and 12 and only around 13 will it dissipate to minute levels. A potential issue with that of cruise is 3 weeks is half your cruise.
I'll share some personal and you can take it or leave it.
For an 18 month period I blasted and cruised never dropping my weekly dose below 500mg and the blasts were around a gram and a half. Gains were good and never lost much of anything with a 500mg cruise. But I wasn't closely monitoring my bloodwork. Once I finally got tested it was atrocious. HDL which was near 40 before this run had dropped to 11. RBC, hematocrit, iron were all well above normal range. I've spent the last 2 years lowering cruise dose, extending its duration and being more careful with my compound selection. For instance the eq you wanna run really jacked up my rbc and hematocrit to the point where I probably will never run it again. Tren is harsh on my lipid profile so I run less and a bit shorter duration there.
You'll have to make your own adjustments of course based on your own numbers but do yourself the favor of making sure you know how and what to adjust. Bottom line is you cannot indefinitely run high doses of anything with some eventual penalty so to speak. This is why cruise dose is a measly 50mg EOD. Its where I need to be for recover since for me blasting and cruising I plan on doing for decades not just a short time. If you build a solid physique you can maintain most of it cruising on a trt-ish dose for a couple months