I think if Ivan Tony’s available then we should take the chance to sign him. Like Scholes said we use to have 4 world class ST. Having 3 rotating and playing together should increase our scoring record.
Not disagreeing with you, although I do think things were a lot easier when it came to squad composition when teams played 4-4-2, which we did for at least part of Scholes' career. Difficult to figure out how many you need these days.
Wing forwards are closer to being strikers than traditional wingers were so asking them to fill in at times is an option although we all know how that goes with Rashford! Mind you, you can always look to target players who do have that solid track record of versatility to perform decently in more than one position across the front 3 or 4. From the past a Salomon Kalou type perhaps? He had good enough goals/assists to minutes ratios for Chelsea considering he was often on the bench and could play multiple positions. Handy type to have. Amad may even develop into that for us, wouldn't rule it out.
Hojlund is only really a striker, Zirkzee I don't know that much about so correct me if I'm wrong, I heard he was a bit more versatile, although
transfermarkt says he hasn't played that much away from the central role. Another addition could be good, but should it be someone more versatile than Toney? What happens if Hojlund gets on a roll and someone like Toney didn't get much chance to play centrally? Maybe then you'd want someone who had more strings to his bow than Toney so you could play him wider or as an 8 or 10 at times to keep him happy?
Perhaps we actually want to play 2 up top at times? Doesn't even have to be from the start, just within games. That would certainly be a reason to consider a 3rd.
In an ideal world you'd have has many options as possible of course, but finances come into play, PSR too these days as well as giving everyone enough rotation and game time. Perhaps you can get better value by juggling things differently?
It's tricky! I don't have the answer, just thinking out loud. 4-4-2 was a doddle in comparison for squad management. 2 for every position, and if 1 ST is injured or suspended at worst you're first in line to come off the bench with the chance to replace one of 2 different players. 3 into 1 still puts you on the bench if 1 is out, but if you're not versatile you can only come on to replace 1 guy most of the time and if he's playing well then chances are limited.
In terms of quality I'd have no qualms about Toney as an option.