Speaking about this two players, I think Chelsea will win more games if this two players can connect, I was already thinking about this as I have written in the past then today I saw a sport journalist say the same thing while scrolling through twitter. Lukaku stamina and Timo Werner speed can be combined and they become an unstoppable force. Thomas just have to know how to achieve this and playing them together can give him a clear picture.
He should start from their training, they should train together, then play together. If the chemistry is not there at first that does not matter as with time they will know themselves better and understand their style of play and when that happens, they will be unstoppable.
I agree with you, Tuchel should be able to take advantage of this well, I think actually Tuchel has paired the two players in several matches, for example in the match against Manchester City, but unfortunately the duo did not run optimally because there was no chemistry between both players and if tuchel manages to get them for click and can develop a way for them to combine and assist each other in the next chelsea game, of course them will certainly be a deadly duo for the opposing defence.
Honestly, comparing Lukaku's play style with Timo Wener, there will never be any Chemistry between them any day. Their individual style of play are not related. Stamina and speed do not play football but brain does.
Again, Lukaku does not need such support from anyone to get good results. The only one that would have done that perfectly is Giroud.
What Lukaku needs is a nice game built up from midfield and it's midfielders that will do that.
Timo should be there as a standby to Lukaku anytime.