Here's why I think the club is not going to sign 2 wide players. Let's say-
-----------------Chez----------------------
RB-------Mert-----------Kos---------Gibbs
------------DM/Arteta-----Ramsey--------
---------------Ozil------------------------
Walcott----------ST---------------LM
I've listed who're are pretty much bang on to start games. For the wing spot you have Cazorla, Rosicky, Podolski and Chamberlain competing along with maybe Gnabry as well. For midfield positions you have Rosicky, Cazorla, Chamberlain, Wilshere and Flamini. There is no space for other midfielders when you account for the DM the club might also look to buy. Unless the club want to alternate between Giroud who's according to many not good enough himself and a player who hasn't played as a striker naturally for years in terms of those wing options plus the touted purchases of Vela than only would the players possibly get enough match time. Given the resources available it is absolutely negligent to start with Giroud next season. 12 against the top 7 every season where he is pretty much anonymous.
The lone striker theory on Sanchez and Vela has no credibility beyond the forum football managers. Not only that but it's plain ridiculous- Hey I want this player here no matter what. It doesn't matter that he's never played up-top convincingly before but it's better to spend money on winger's and play them as strikers in the most physical league rather than sign an established striker.