Wit's End gives 40% AS and +42 Magic Damage
Ionic Spark gives 50% AS and every fourth attack procs a chain lightning
Several builds for AS focused champions such as Irelia recommend a Wit's End, in her case it also benefits Bladesurge which helps with killing fleeing enemies. However, in the general case and if I am trying to adapt my equipment to the situation (and I have an AS focused champ) – how to decide between them?
Best Answer
Wits End also gives you some magic resist (+30 base, upto +50 total) and costs 2150 total
Ionic Spark gives +250 health and costs 2100 total.
The average extra damage-per-hit is approximately the same, so we'll ignore it as well as the 50 gold difference in building.
So the things that you need to consider are as follows:
what is more useful? 50 MR or 250 HP?
early on, do I prefer a Ruby Crystal or a Null-Magic Mantle?