it's 5000 services to get to 50 CER of a single type of WPS, the cap is actually 5000 services total which would be 40 cer of each damage and crit if you split it)
Realistically once an item is at about 25-27 CER, with no other properties at all, it's out of player range. 27 CER by itself adds 729 difficulty which might be in range with max skill + enhancives. If you had max everything including ascension you MIGHT be able to get up to 28. After that you'd need difficulty potions like they have for the other player services.
Mithrilschlong, 2015-03-10 to slightly later on 2015-03-10. You will not be forgotten!
usable Meteor Swarm, late 2020-12-30 to early 2020-12-31. You will also not be forgotten!