The opposite of "more attritional," which means causing gradual but persistent wearing down or weakening, can be described as "less exhausting" or "non-debilitating." These terms suggest a lower level of intensity or impact, signaling a gentler approach or result. Another antonym for "more attritional" could be "invigorating" or "stimulating," which implies a positive and energizing effect rather than a draining one. Additionally, "less challenging" or "non-demanding" can signal a lower degree of difficulty, effort, or struggle, highlighting a less challenging experience. Overall, these antonyms offer alternative ways to convey the opposite meaning of "more attritional," with different nuances and connotations.