I would vote for something like this:
20% archers for attackers
0% horsemen and 50% archers for defenders.
But it's not possible, probably
i think the poll is proposed due there being more than 50% archers for defenders specially when Vaegir faction is defending
Make it balanced
Defenders have a clear advantage defending walls, chokepoints etc etc. Only reasonable thing would be to balance the server. Its not like class limit isn't always there, this poll just wants it extended regardless of the amount of people there.
Siege has always been campers vs rushers in general, 1 side has the advantage of quick respawn, other side has the advantage of close respawns locations. In my opinion usually what makes game feel unfair is when you get scenario where 1 team, regardless of attacker or defender, has high quanity of clan tagged players like AT guys vs other side that has more casual dudes with ping rating from 20-200 who do more chatting and trolling than playing. class limit in that case doesn't necasserily change the balance if you got 10 timmys as archers who aim worse than blind men while other side rushes through backdoor with shields and full helms and finishes off the timmys very quickly