The original, since 2003.
I think the only way to keep it from doing the atack at all is to damage it enough so that it skips from the first attack to the third one. I'm not sure if there's a surefire way to avoid Mother doing the attack altogether though. Mother keeps the last three attacks of the bosses in her queue and tends to use them at random except when a new boss icon appears. I've found that each time it gains a new attack (Ellmac's for example), that will be the next attack that Mother will do after she finishes her current attack.
So the only way to really avoid it is to hit her a couple times when she does Amphis' attack, then spam flail whip on her next Amphis attack until the Ellmac icon appears. Hopefully she'd do that, then another Amphis attack, giving you enough time to advance her to Bahamut. You still have to get her to the Viy icon though, after that she won't do the Ellmac attack anymore because the AI only keeps the last three attacks. (Exception: At the end when Mother's Icon appears, she forgets Palenque's attack, opting to keep the Viy Laser)
If it sounds complex and ridiculously luck-based, that's because it is. And even then she may do a Sakit attack anyways when she hits that icon.
So the only way to really avoid it is to hit her a couple times when she does Amphis' attack, then spam flail whip on her next Amphis attack until the Ellmac icon appears. Hopefully she'd do that, then another Amphis attack, giving you enough time to advance her to Bahamut. You still have to get her to the Viy icon though, after that she won't do the Ellmac attack anymore because the AI only keeps the last three attacks. (Exception: At the end when Mother's Icon appears, she forgets Palenque's attack, opting to keep the Viy Laser)
If it sounds complex and ridiculously luck-based, that's because it is. And even then she may do a Sakit attack anyways when she hits that icon.