http://ffxiv.consolegameswiki.com/wiki/Commands

LT(L2) + ← = LDL(LD1)
LT(L2) + ↑ = LDU(LD2)
LT(L2) + → = LDR(LD3)
LT(L2) + ↓ = LDD(LD4)
LT(L2) + X(□) = LAL(LA1)
LT(L2) + Y(△) = LAU(LA2)
LT(L2) + B(〇) = LAR(LA3)
LT(L2) + A(Ｘ) = LAD(LA4)
RT(R2) + ← = RDL(RD1)
RT(R2) + ↑ = RDU(RD2)
RT(R2) + → = RDR(RD3)
RT(R2) + ↓ = RDD(RD4)
RT(R2) + X(□) = RAL(RA1)
RT(R2) + Y(△) = RAU(RA2)
RT(R2) + B(〇) = RAR(RA3)
RT(R2) + A(Ｘ) = RAD(RA4)

Here's what my macro looks like

/micon summon
/ac "summon" <me>
/chotbar pet "Embrace" eos 1 RAL
/chotbar pet "fey covenant" eos 1 LDU
/chotbar pet "fey illumination" eos 1 LAL
/chotbar pet "whispering dawn" eos 1 LDD

I have a similar one for Selene as well. Will automatically swap in the proper embraces/ other fairy skills on summon.