Try using flag locks mid-game. You also might want to end the game as early as possible, since QoT just can't compete with other DG late game, something that is going to happen if you depend on the flag score to win.

QoT is only horrible in the late game because we save everyone else from buying citidal upgrades.  your other players should have some pretty kick-ass gear.  You should have a HoL and a ton of minion stuff as well as some cap locks.  At least the way I play.  You should also be shielding your allies to the max.  If someone starts going to you, just run and let them follow.  Your shield should suffice against any demigod chasing.  

Again, QoT should be support, she can't compete with other Demigods near the end of game, but she makes your ally demigods hard as hell to kill and very powerful, making up for her attack weakness.

What attack weakness? She's every bit as fierce endgame as any of the other demigods.  Stop being an enabler when my friends and I play together on team we announce what we are buying when, so everyone knows what's been bought and by whom.

That keeps gold expenditures relatively equal and the QoT with attack enhancers hits every bit as hard as Regulus with the added bonus of being able to debuff others armor...

I'm sorry but both of you apparently haven't seen a QoT use the shield properly.

Spamming shields on both yourself and your allied DGs will enable you to hold flags and save for a coordinated attack from two other DGs, nobody will be able to put you down.

Actually QoT is one of the STRONGEST Demigods endgame, simply because skill dmg are dwarfed by the auto-attack dmg late game, due to items. Also, as she has the ONLY money-making skill in the game, she will be richer than others, affording better items lategame. This, coupled with the fact that her auto-attack is ranged (one of the 3 only ranged dgs in the game), and the ONLY DG with SPLASH DMG default on auto-attack (in closed form)...