The thing is that the time travel is largely useless here... no seriously. you can't use it any real way outside trolling people like Interpole. I'm pretty sure she gives stuff back just to annoy them. Possibly before anyone noticed she stole it in the first place.. which is why you can end up retreiving the smae item in a future mission after losing it.. You can't even stop Angry M from getting in the Grail without canceling out Shiro's existance. Sad as that is. The thing is I'm pretty sure that Carmen Sandiago is (relative to this prospective canon) the one who invented Time travel in the first place. From what I've heard the Narsuverse canon is that some magus invented Time Travel and then disappeared forever. In short, somemagus proved it was possible and bailed, just to annoy everyone.
Utopia is boring and pointless... there wouldn't be anyone to make her not bored. The lack of Interpole would be boring. Its more likely she'd swipe Sakura's traumatic memories and 'gift' them to head of a certain ruling member of homunculous spamming family in trade for all their grimorums and equipment. Then steal Sakura's 'grandfather' and all his familiars and drop them off on Krakatowa 20 seconds before it explodes. You know that spider they found as the only survivor of the island... it was red from rage not its natural colouration. It takes him until the end of the 5th war to get back... everytime he acts miserable to someone he ends up dumped in another volcano. Shinji ends up going through training from hell... then ending up a minion that Interpole catches whenever they miss CS. They break him out after they make him sit around be trialed. Then more training and more being a scapegoat. Ad infinitum.
Shiro ends up using time hax (not needing him to be the caster of them) to save pretty much everyone. Anyone he fails to rescue he gets to try and save again through temporal dickery. He gets really good at switching victims out with homunculus just as they are about to be killed. The trick is carrying this out without getting a sealing designation or lynched. The other trick is stealing himself from the past and tagging in to fight battle at full strength. Using this trick they can save Archer by swapping the 'dead' people out for the live ones an letting him dodge that counter guardian thing. CS loves trolling the spirit of humanity after all.
So in short...the secret of sucess is more trolling. More Trolling!!!
Utopia is boring and pointless... there wouldn't be anyone to make her not bored. The lack of Interpole would be boring. Its more likely she'd swipe Sakura's traumatic memories and 'gift' them to head of a certain ruling member of homunculous spamming family in trade for all their grimorums and equipment. Then steal Sakura's 'grandfather' and all his familiars and drop them off on Krakatowa 20 seconds before it explodes. You know that spider they found as the only survivor of the island... it was red from rage not its natural colouration. It takes him until the end of the 5th war to get back... everytime he acts miserable to someone he ends up dumped in another volcano. Shinji ends up going through training from hell... then ending up a minion that Interpole catches whenever they miss CS. They break him out after they make him sit around be trialed. Then more training and more being a scapegoat. Ad infinitum.
Shiro ends up using time hax (not needing him to be the caster of them) to save pretty much everyone. Anyone he fails to rescue he gets to try and save again through temporal dickery. He gets really good at switching victims out with homunculus just as they are about to be killed. The trick is carrying this out without getting a sealing designation or lynched. The other trick is stealing himself from the past and tagging in to fight battle at full strength. Using this trick they can save Archer by swapping the 'dead' people out for the live ones an letting him dodge that counter guardian thing. CS loves trolling the spirit of humanity after all.
So in short...the secret of sucess is more trolling. More Trolling!!!