Actually @Lucas.Pimenta’s idea is very good in my opinion becauseyou can use Type into without a selector(so you don’t need a text field). Send Hotkey is an activity which is kind of a particular case for Type into.
This is an example I have found for WriteText method:
text = "AbC[d(ctrl)]a[u(ctrl)k(alt)]"
This sample sequence outputs “AbC”, then holds down (d) the Ctrl key, presses “a” and then releases Ctrl (u) and hits Alt (k = press and release).
k:=synthesize a key down followed by a key up event for the specified key.
d:=synthesize a key down event for the specified SPECIAL_CHARS.
u:=synthesize a key up event for the specified SPECIAL_CHARS.
So after you get your chars from the Excel file you can use string manipulation to make it work like in the example. I hope it helps!