https://wiki.project1999.com/Hexed_Kerran_Doll +6 CHA
https://wiki.project1999.com/A_Crude_Stein + 15 CHA
https://wiki.project1999.com/Golden_Cat_Eye_Bracelet x 2
+14 CHA
https://wiki.project1999.com/Siryn_Hair_Hood +13 CHA
https://wiki.project1999.com/Electrum_Star_Ruby_Ring x 2
+14 CHA
https://wiki.project1999.com/Platinum_Star_Ruby_Veil +9 CHA
https://wiki.project1999.com/Opalline_Earring x 2
+10 CHA
https://wiki.project1999.com/Cat_Eye_Platinum_Necklace +9 CHA
https://wiki.project1999.com/Drake-hide_Leggings +5 CHA
https://wiki.project1999.com/Silk_Evening_Tunic +5 CHA
That's a nice even total of
+100 CHA from easily obtainable items in classic.
If you made a Human with +25 WIS and +5 CHA at start, you could still end up with 180 CHA for high risk calm pulls. In contrast, the cost to obtain +100 WIS from items in classic is much higher.
I have leveled multiple Paladins and Clerics and am very familiar with the calm line. For most pulling situations calm is realistically just being used for convenience and a critical failure won't get you killed, and you're perfectly fine with even under 100 CHA if you're killing XP mobs (had a Dwarf Pally who got a lot of use out of it, even). Yes, there are rare situations where a failed calm is likely to get you killed, but as Danth pointed out, why the hell would you want your Cleric pulling in that situation, as your Cleric is also your rezzer? It makes no sense.
Basically, it only makes sense to pump CHA if you only want to solo your Cleric deep inside dungeons and can twink with +WIS gear already, or you intend duo heavily with a non-Enchanter, non-puller class (i.e. Mage or Warrior) and know you will be the primary puller. In other words, 99% of Clerics should not be doing it and are better off pumping WIS at creation.