it's a star trial. Therefore you have 2 weeks time to level up stuff (try to follow the guide , and level the units used by the guidemaker , or units that can replace those wtih similar results).
Sophie is a good unit and a great lighting rod , but honestly , othern then the last map ...and maybe the desert map (to be honest i tanked the red drake with my prince0 , i don't really see much use for rods on this event.
Edit : spica is a good pick up , so if you can get it , i'd do it. If u have yuyu , i honestly wouldn't bother with cloris. She's a rather bad witch by all standards , and yuyu has overall higher dps then even belinda - a plat witch - untill AW (and thats because of belinda's AW passive that gives 7% increased damage) , and even after AW , she remains competitive.
Odette is a strong mage , but unless u got her at a rather low cost (at least 3 - 4cr or so) , you wont get to deploy her that much for the simple fact that shes expensive as fuck for a mage. Event units start at +2 cr over premium units (which is why premiums have a max cr of 3 usually , while evets stand at 5). On top of that , odette starts at an additional + 2, for a grand total of +4 over a normal premium plat mage , making her quite hard to field if not reduced.
But her stats are good at least.