Millennium War Aigis - Base Scramble I 4★
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Higher attack on the mummies mean certain death to your tanks if you don't kill them fast enough, meaning you are based off either with higher burst or high sustain, of which the former is easier to achieve. This run is experimenting on the latter, hence no skill use on the ranged physical units.
In the case of burst, Bashira as a replacement for Maurette would have been sufficient to not use any tokens as her skill uptime would be sufficient even without SAW to kill key targets, mainly the stronger demon and mummies. It will also remove the need of another Witch as supplementary damage and slow utility. Dropping any Gunner as a replacement for Mage will also improve overall damage output due to the scaling magic resist on enemies for this map.
In the case of sustain, do note that Iris in this run is fully stacked (SAW/AW2/150% AFF). Her heals alone would be hard to emulate unless you first pick Rinne. As replacement, running higher defense tanks will work; while Beatrice isn't free, her accessibility through gold rush has been excellent that it isn't too difficult to get her now, and she is pretty amazing post SAW. Alternately, pushing through the story missions to unlock Sacred Equipment for your prince is also a viable option.