We only need one conjure skill which conjure different weapons depending on your current attunement. Then instead give us 4 Summon Less Elementals utility skills so we don’t have to switch attunement to summon a specific lesser elemental then wait for 10-15s to be able to switch back our prior attunement.
The fact is, most of us DON’T use conjure skills at all and 4 of them just take up our utility skills. On the other hand, most of us only use Earth Elemental (because the rest gets killed very quickly) and when you are in trouble and you need a pet, you need to switch to earth before you summon, then lose another 10-15 sec to be able to switch back to your default attunement (which is usually Fire that is only capable of doing decent damage).