Best Wards LoL??

It depends on your role, what items you get, etc. but IMO its best to have both totems and one sweeper on each team. Are almost identical, only differences are range and total area covered ( Sweeper can be placed at range, oracles can be used to sweep much lareger area) They're best for Junglers and Supports with . Squishy supports could take lens over oracles,

Is good for consistent warding potential, with the ability to store charges. Also good if you have some weird interactions with wards

Is best for long-range warding, as well as warding dragon or baron while the enemy is taking it as, while the ward may die, the vision area upon placement is useful

I think the best roles would probably be Top Jungler Mid Adc Support