back when i still pvped my only challenge was that sometimes my target keys got blocked, especially when i wanted to heal myself and cast right after so i then had to click set target all over again, cancel it and go from there.
You need a clear target cue hot key. I hit mine before casting at times to make sure I haven't cued myself in the heat of battle. Mouse wheel works great for cue targets self and cue last selected target. You can change the color of your selected targets too. Highlights them nicely with your chosen color. Also you need a resync hot key which is an absolute must to PvP. The more ppl on the screen the more I desync.
Im not pvping atleast not maging, the only scenario in wich i might make a mage and collect heads or something is when i get bored of my dexxer.
Biggest challenge, it's surviving the synch dump. Sometimes I can wand and pot out of it but when it's synched right it's simply a killer. Haven't been here long but I have learned that if confronted by two or more mages who can synch fairly well together it's best to recall.
I have a hard time finding honorable opponents. I also have some issues using wands. They never really interested me. They may be very useful, but I always felt like tinker bell when using one.
This is typically what a wandering healer says to me every time I get a rez. I find it challenging to avoid this all together.