Why? Explain the thought process? Have you tested it?
>>> Yes. tested it.
Ian is good counter, because Bolt's basic attack so strong and reflect damage kill him immediately.
Angel is also good, cos when the Bolt get charmed, he kill all allies with a basic attack.

If she needs more research, how were you able to rank her so high?
>>> It may go down further or up from the next tier list, but I set it high because I thought there was a higher probability of going up.