Hi 
So, everyone is speaking about "must have" items. But which items do you purchase nearly everytime?
I´m trying to go often for this items (in this order):
1. Mage Slayer
Costs: 8000
+30 Weapon Damage
+20% Attack Speed
+15% Life Steal
40% chance on hit to stun target for 0.2 seconds.
5. Wyrmskin Handguards
Costs: 1500
+15 Weapon Damage
20% chance on hit to eviscerate the target dealing 100 damage and reducing their Attack Speed and Movement Speed 25%
2. Nature´s Reckoning
Costs: 1500
+600 Mana
15% chance on hit to strike nearby enemies with lightning for 250 damage
3. Journeyman Treads
Costs: 6750
+400 Health
+15% Movement Speed
5% chance on being hit to increase Movement Speed by 50% for 10 seconds
4. Warpstone (depends of the character I´m playing and if this is an assasin or general)
Costs: 2500
30yd range
0.5 sec casting time
30 sec cooldown
Use: Warp to a nearby location
Favor Item while playing as a general (like Erebus):
Cloak of Night
Costs: 380
Instant casting time
20yd range
30 sec. cooldown
Use: Warp to targeted location, dealing 200 damage upon entry.
+280 Mana
+4 Mana Per Second