Son is finished at this level mate. My prayer is we get an unsentimental manager in the summer who sells him to Saudi for £40m while we can still get that for him off his name value. Wissa would certainly be a stronger option than Son at 9 who offers worse than nothing. Kulu only really plays off the right when he plays wide so not massively relevant, Solanke does likely start at 9 over Wissa but Wissa would very likely start off the left for us even with all fit right now.
Off the strength of what evidence will Tel start for us where Wissa wouldn't? He was pretty underwhelming in the Bayern side that had their worst season in well over a decade last year and has been pushed out of the team completely, he might be shit hot or he might just be shit, let's not pretend he's some sure thing or else he wouldn't be sat on the bench watching Olise gobble up all his minutes at Bayern. I'm aware we're in the mud at the moment and just need bodies in to feed the hamstring meat grinder that is Angeball but Tel represents just as much of a gamble as eg Odobert.