A lot of people seem to think that TLT's work best in groups of 3+ due to their ability to cover their gap. I have had similar poor results when using pairs of TLT Y's in 100-point lists.
I've been having really solid results using a Goldie with ion cannon, title and R3-A2. I fly it just slightly behind the TLT Y(no title). Any soontir or Corran or Han that wants to boost into range one of the TLT is signing up for 2 stress and possibly an ion token. I've found the results to be significantly better than pairs of TLT Y's.
I've used Corran or 3 A's or 4 Z's to fill, but you could use just about anything with either high efficiency or solid closer characteristics.