Based on
thrill-data.com's data on when LLs ran out today, it's pretty clear what two Tier 2 LLs to prebook:
Magic Kingdom:
Haunted Mansion ran out at 7:58
Pirates ran out at 9:22
Epcot:
Mission Space ran out at 9:00
Spaceship Earth ran out at 11:43
Hollywood Studios:
Toy Story Mania ran out at 8:13
Tower of Terror ran out at 8:41
Data also shows the best strategies for Tier 1s:
Magic Kingdom:
Prebook Tiana (ran out at 7:10)
Get LL #4 for Jungle Cruise (ran out at 9:50 ) or Big Thunder (ran out at 10:01) or Space Mountain (ran out at 11:29)
Might be able to get Big Thunder or Space as LL #5
Epcot:
Prebook Remy (ran out at 7:38)
Get LL #4 for Frozen (ran out at 10:13)
Get LL #5 for Soarin (ran out at 8:30 PM)
Studios:
Prebook Slinky (ran out at 9:16)
Get LL #4 for Rock n Roller Coaster (ran out at 10:18)
Get LL #5 for Mickey and Minnie's Railway (ran out at 4:15)
Get LL #6 for Millenium Falcon (ran out at 8:30 PM)