How much does adding a striker help Arsenal's top 4 odds?

Using my simulation model to estimate how much a striker can change the odds for Arsenal.

The headline of this is an almost impossible question to answer because plugging in a player into a team and then saying what the outcome will be is hard in a sport like soccer. So rather than try something like that (which is probably above my own capabilities with my current tools) I am going to just make adjustments to the team ratings that power my simulation model as a way of figuring out what could happen if Arsenal makes a big striker signing.