Hey, I'm pretty new to Vanilla WoW and want to know if there are any essential or very recomended Caster AddOns. What I'am especially looking for are AddOns wich improve Castbars (eg. showing mSec and showing me when I can allrdy cancle a cast due server lag etc), Focus casting while remaining on target (is this even possible in vanilla?), target notificator (a message if I'm beeing targeted), some overall Interface improvements (eg. showing absolute HP/Mana of target) and pretty much anything else that improves my PvP.
Also, are there any essential Makros?
Hope you guys can help me out, big thanks in advance!