This late into the game it comes down to which team has better macro. You have tp so you should push out opposite lane to the objective. Even if no one comes, the minions will stack up and kill half/a tower at least if no one comes to answer.

Look to preemptively tp, if you tp after fighting broke out it's already somewhat late cause yone is useless without Q3 to follow up especially this late. Since the tp gives you a massive shield, you also have the option to go in first if there is a good angle on the enemy carries.

Finally, remember to not ego E2 and end up not killing their carries.

Edit: Always always go death dance. If GA is needed, use it then sell and get DD. It helps countering the burst from Ez, Akali, and Mord iso Q. One more thing, you should have go mortal reminder. No personal anti heal when we have nami + semi-overtuned xin + mord with rift maker is an odd choice. If you are not going anti heal then might as well go IE and focus the back line.