when finished, my army will have a
DP with warp time as the "leader" and also a terminator lord, just cuz the model is cool and it came with my army box set anyway

in the 2 games I've played so far I just had him running around with my 5 terminators to make them even meaner.
A buddy of mine runs a plague marine list with just 1 winged
dp w/ warp time as his
HQ, he usually uses it to flank around stuff while you're busy trying to kill off his double-save plague marines.