How does Blue Teemo's targeting work with Deflect, and does the player choose targets?

Ruling: When you play Blue Teemo's triggered ability, you select up to 5 targets before revealing cards. You only target once regardless of how many damage instances are dealt, so you only pay Deflect once even if you assign multiple damage to that target.

Sequence:

• Select up to 5 targets using the split rule
• Reveal the 5 cards
• Count the number of hidden cards revealed
• Drop any excess targets (if you have more targets than hidden cards revealed)
• All remaining targets must be assigned at least one damage
• Damage is dealt in packets of 2 that cannot be split

Nuances:

• If you target a unit with Deflect and it's your only target, you are forced to pay the Deflect cost
• Each instance of damage is affected by effects like Void Gate/Annie Fiery, dealing +1 damage per hidden card revealed
• When defending with Teemo, the triggered ability only triggers once, not twice
• You must commit to targets before knowing how many hidden cards will be revealed, creating a gambling element when choosing targets