Other (common) combinations I have gotten to know:

Alpha
SEI: 9w1
LII-Ti: 5w4, 5w6
LII-Ne: 9w1, 5w4

Beta
LSI-Ti: 5w6, 9w8
LSI-Se: 6w7
IEI-Fe: 2w1, 6w7, 4w3
IEI-Ni: 9w1, 6w5
EIE-Ni: 2w1
SLE-Se: 8w7, 6w7
SLE-Ti: 8w7

Gamma
SEE-Fi: 3w2, 7w6, 7w8
ESI-Fi: 9w1, 4w5, 4w3
ESI-Se: 9w8
LIE-Ni: 8w9
ILI-Te: 6w5
ILI-Ni: 1w9

Delta
IEE-Fi: 7w6, 7w8, 3w2, 2w1
IEE-Ne: 7w8
EII-Fi: 4w5, 9w1
EII-Ne: 4w5, 6w5
SLI-Te: 6w5