I use warp area inbound to deal damage, I am usually not aiming at creeps with it.
Why bother with EoM if you're getting Warp Area? At rank 2 a BotS gives you full mana off it, seems pointless to fuss with EoM. That's not even mentioning that BotS gives better regen than EoM even if you don't get Warp Area.
I will 2,1,3 regardless if there are creeps or minions next to the target, infact I prefer not to spaz out all over the place on the initial inbound attack so I know where I will be, right next to the target. It's free, and DMG is DMG.
Also, I will only get extra mana from
Unbreakable
Nature's Rec
Because I also am using
Banded
Nimoth
Hauberk
Pulling 2,1,3 on inbound is alot of mana to have to recover using BotS for this item load out if you expect to spine and strike again when the cooldowns are reached, or you want to swap later or pursue to warp strike behind towers (thanks to that much life.)
There's also much less DA squishiness using these items. Max spike, warp strike, and swap, 2 points in warp area and the rest in dodge.
I guess for this build I find that EoM is simply easier to manage mana then BoTS for DA once you go into battle.