WOLTK- Why is Archus, Greatstaff of Antonidas not BIS fior Shadow Priest?
Saw this guide (https://forum.warmane.com/showthread.php?t=305558) says the BIS for Spriest is https://www.wowhead.com/wotlk/item=5...-of-terenas-ii and https://www.wowhead.com/wotlk/item=5...impaling-spike.
However, using the stats weight provided by that guide, Archus (https://www.wowhead.com/wotlk/item=5...f-of-antonidas) gives better Spell Power and Haste over 1 MH + 1 OH combined.
Here is the stat weight from the guide:
Spell power = 1 spell power
Critical strike rating = 0.76 spell power
Haste rating = 0.98 spell power
Hit rating = 1.88 spell power (when not hit capped)
Intellect = 0.22 spell power
Spirit = 0.59 spell power
This is calculation:
RS + CIS
81 stam + 44 stam = 125 stam
81 intel + 44 intel = 125 intel -> 27.5 SP
55 crit + 38 crit = 93 crit -> 71 SP
71 haste + 30 haste = 101 haste -> 99 SP
893 SP + 58 SP = 951 SP
= 1148.5 SP
Archus
= 188 stam
= 188 intel -> 41 SP
= 141 Spirit -> 83 SP
= 141 haste -> 138 SP
= 893 SP
= 1155 SP
Overall Archus gives similar SP vs the other BIS combo. This is not inclusive of 3 red gems vs 1 red + 1 yellow AND better WEP enchant (83 SP vs 63 SP).
So someone correct me if I am missing anything on why Archus is considered crap or not worth to buy?