120s or 140s as a solo player in 3s?

What's objectively the best value pick to a team?

It seems with a 140 there is less forgiveness and less chunk damage potential so you are a bit on your own

But

If you don't find teammates that coshoot then you better of a 140 for the quicker ttk?

But

If you miss the ttk of a 150 becomesuch less forgiving

What's your take?