well easy :If Pikeman became stronger,as you suggest,what would be the role of Longswordmen,Musketman and Knights?
longswords (mounted or not) dominate early middle-age and are useful till late middle age.
knights come late middle-age and are not so good with cities (they are mounted) but crush longswords on the field
here come tercios and pikes : early renaissance (XV° - mid XVII°):
Pikes/tercio becomes obsolete by Nassau's military revolution and the heavy use of late-muskets.
before that, well they ruled.
Spoiler wikipedia :
wikipedia
More substance has the case for the “return of Heavy Infantry” as Carey has named it.[21] Pikemen, unlike other infantry, could stand in the open against heavy cavalry. While requiring drill and discipline, individual training requirements were much lower than those for archers or knights, and the switch from heavily armoured knight to footsoldier made possible the expansion in the size of armies from the late 15th century onwards as infantry could be trained more quickly and could be hired in great numbers. But that change was slow.
The full development, in the 15th century, of plate armour for both man and horse, combined with the use of the arret (lance rest) which could support a heavier lance, ensured that the heavy cavalryman remained a formidable warrior. Without cavalry, a 15th-century army was unlikely to achieve a decisive victory on the field of battle; battle might be decided by archers or pikemen, but a retreat could only be cut off effectively or followed-up by cavalry.[22] In the 16th century, a lighter, less expensive and more professional cavalry gained ground, so that the proportion of cavalry in the armies actually grew continually, so that in the last battles of the Thirty Years War cavalry actually outnumbered infantry as never before since the high feudal period.[23]
More substance has the case for the “return of Heavy Infantry” as Carey has named it.[21] Pikemen, unlike other infantry, could stand in the open against heavy cavalry. While requiring drill and discipline, individual training requirements were much lower than those for archers or knights, and the switch from heavily armoured knight to footsoldier made possible the expansion in the size of armies from the late 15th century onwards as infantry could be trained more quickly and could be hired in great numbers. But that change was slow.
The full development, in the 15th century, of plate armour for both man and horse, combined with the use of the arret (lance rest) which could support a heavier lance, ensured that the heavy cavalryman remained a formidable warrior. Without cavalry, a 15th-century army was unlikely to achieve a decisive victory on the field of battle; battle might be decided by archers or pikemen, but a retreat could only be cut off effectively or followed-up by cavalry.[22] In the 16th century, a lighter, less expensive and more professional cavalry gained ground, so that the proportion of cavalry in the armies actually grew continually, so that in the last battles of the Thirty Years War cavalry actually outnumbered infantry as never before since the high feudal period.[23]
muskets... well, at first they have no real use as a melee unit, save that normally they should be way less costly than archers/longbow.
technically, early muskets were :
1) way cheaper than bowmen and especially longbows
2) less accurate than longbow
3) more powerful than longbow/X-bow
4) quicker to reload than X-bow.
5) easier to use through a firing slit than X-bow and longbow (think castle/
6) they made armor almost obsolet at close range.
7) did I mention cheaper ?
Early Muskets were not melee-like ; you had to wait until the late XVII°century muskets (lighters weapons + invention of bayonette) to obsolete the tercios and use muskets as the main effective infantry unit.
"wikipedia : 16th-century troops armed with a heavy version of the arquebus called a musket were specialists supporting the arquebusiers and pikemen formations. By the start of the 18th century, a lighter version of the musket had edged out the arquebus, and the addition of the bayonet edged out the pike, and almost all infantry became musketeers."
In fact, the main interests of early muskets were :
-skirmishing/banditing as you go put a knight down easily
-naval fights
-defensive fight : defending a house, a city
-hiding inside tercios to fight the other guys.
late muskets : they fill a 2 century-long gap between tercio and rifles :
In fact, late muskets (muskets used in the way melee is used) never encountered knights or longswords.... (at least in fight in europa ; Knights as a fighting heavy mounted unit was already obsolated by Pikes/Tercio, so it went out of use. It was replaced with a medium-weight/cheaper cavalry; think cuirassier or something.; or cavarly with light metal armor and saber and wheelgun ; and by Lancers... those were good units, light-to-medium-armor, long lance...nice stayed useful up till WWI and encountering machinguns)
England in Zululand was typically late muskets fighting hords of swordmen / longswordmen Zulu UU.
So depending on what represents muskets :
- early muskets would be :
-archery unit
-stronger ranged attack than Longbow
-smaller range
-cheaper ; way cheaper.
Late musket would be :
-melee-like unit (gunpowder unit)
-greater strength than Tercio/Pikes
-lower strength than Rifles
But all this strength-relation will heavily depend on the different times the unit appear in the tech-tree.
So..