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+ 3
+2
+ 6 (2 from the item and 4 from imbument)
+ 4
+ 2
+1
+4
+ 7 (3 from item and 4 from imbument)
+3
+5
If you use everything listed above (except for Terrorbird as most people don't use it regularly) you will have 32 additional magic levels.
If you use mana leech instead of magic level on wand / rod it will 28.