I disagree, Jura only used one attack on God Serena, and it wasn't even Mt Fuji, don't mean he wasn't outclassed. Sure he could have used Rock Mountain to block Serena's attacks and stuck around longer, but his defeat was inevitable, just like Lucy and Wendy vs Kyria. You could say the same for a lot of fights that end in a stomp, they rarely ever show the loser using all they got, Neinhart vs Natsu, Laxus vs Tempester, Jura vs Orga, Laxus vs Raven Tail, etc
Neinheart could have summoned Zancrow Historia to eat Natsu flames or one of the Tatarous demons like Sayla, Kyouka, etc to use thier hax on him.
Raven tail could have nullified Laxus magic the same way they nullified Lucy and Wendy.
Tempesta could have used Gravity to stop Laxus from moving.
Mind you none of these characters used those attacks at any time during their confrontations.
As far as the others I can't say because I have no idea what other attack they could have used to counter. However I know Lucy has a spirit designed for High defensive capability and so does Wendy have enchantments for this. So if not used during battle all the difference would be made. If Horologium wasn't used in battle against Jacob Lucy and Co would have been trapped in Transport, or if he never saved Wendy from Hades Nuke or is he never saved dude from the Larva. The outcome would have been different had this defensive mechanism not been used. Same with Wendy blocking an attack from Dimiaria if she never did that then Third Origin Chelia would have been overpowered.
So don't say they don't make a difference because we have literally seen they do. Even simple attacks like light, mask or Wool has made huge differences in outcomes of events.
How didn't Lucy fight Kyria? Kyria cut through her Aqua Metria and shredded the Aquarius star dress in their first encounter. In their second encounter, Kyria oneshotted Lucy with a roar inside of Virgo's sand trap. What exactly could Lucy have done to protect herself?
Brandish was holding back against Lucy. She never used her max size, and could have just done any of the things Dimaria suggested.
Lucy already used her star dress mix against Mirajane and Elfman. Unless you believe the Aquarius/Taurus dresses are superior to the mix, then I doubt it would have made a difference. Mirajane went on to have an entire fight with the Dragon Eaters after that too. Madmole oneshotted Taurus, and he has better defense and physical strength than any star dress form or spirit.
She could have summoned Hologium for protection. Also Brandish Shrunk Lucy which would have been the same as Brandish enlarging herself would it not? The outcome in the siutatuion would have remained the same with Lucy using Cancer form to slice her. They only move Brandish could have done against Lucy that she didn't was Enlarge Lucy organs.
Lucy could have fought Elfman in Taurus form going physically toe to toe with him. She could have blocked Mirajane nukes with Aquarius water shield. She could have trapped them with Spica hole. There is countless things that could have been done. Like I said we never seen any of these be used to actually know thier function besides bias speculation. Yes I say bias because you say Madmole had better defenses when simple fact is based on feats both Lucy and Madmole endured the same attacks from Elfman and both were left standing. You are going to say elfman was holding back but can't actually provide a panel or source to verify this besides believing Madmole is superior to Lucy.