Tbh, if I was in your situation I'd abuse hard drugs like Adderall and Ritalin with a brutal deficit. Yeah, that's terrible advice, but I'm not advising you to do what I would do.*

"I can't lose weight with my current deficit. I can't handle a bigger deficit." You have to change one of those variables.

There are plenty of starving people with eating disorders or in countries like North Korea who manage to keep strenuous jobs on <1000 calories/d. But if you're convinced you can't handle it, well, you can do years of research and/or doctor hunting to find something wrong with you, or you can use risky methods to make it easier.

* Having said that, it's clear why your EC stack can't make you go full Requiem for a Dream. The behavioral effects we want from these drugs - appetite suppression and concentration improvement while hungry - are largely centrally mediated. Caffeine's ability to increase catecholamine activity is subject to rapid tolerance, and ephedrine is just a shitty version of meth (early research suggesting its effects are due to adrenergic agonism like clen is wrong, imo), being a more selective NE releaser and less able to cross the BBB. The lipolytic and thermogenic peripheral effects of adrenergic receptor stimulation are also present in hard stimulants. Thus to reach a given level of desired effects with an EC stack you'd have to make your heart work way harder and suffer worse peripheral side effects than with a hard stimulant. Amusingly, because ephedrine almost certainly shares the same neurotoxic pathway as the amphetamines, you might also end up with more neurotoxicity than Adderall, because high body heat increases neurotoxicity mediated by oxidative stress (note that, unlike the amphetamines, Ritalin has never been shown to be neurotoxic and is in fact neuroprotective). The only reason ephedrine is safer is that it makes dose escalation uncomfortable more quickly than hard stimulants, thereby impairing both addiction and effectiveness.