Chidori would be a nice jutsu for Tenshi to learn up in the future, it sort of fits his style of combat.  Up close combat. Although I like Chidori not my favorite jutsu.  One of my favorites is the lighting  lariat, although my all time favorite is the rasengan.  Its so simple but yet one of the most power jutsus.  Also it is suppose to be the most difficult to learn.  Except Naruto and Konohamaru learned it in a shorter period of time then its creator did.  It still very simple.  No hand signs, just needs a lot of charka, or very good control over ones charka it is almost perfect for misfits who don't use a lot of hand signs with jutsu.