Depends on which way you want to. Lerp and FInterpTo should be used on Tick, since you need to update the value continuously over time.
Timeline can be used from a single-call node, but it will have a different behavior: it’s more like animation, you can start it and it will increase the value at desired speed and time. E.g. “fire and forget”. It may be okin case if player is picking up some “restore stamina” bonus or something like that, but not for the constant increase rate.