yes, again

we had a nice 3k Tyranids & 3k Squats vs. 3k SM & 3K Eldar game this weekend.
but as usual some questions came up, i hope you can enlighten us.
1. Can floater (overlord(always on FF) or harridan) 'drop things' on high altitude fliers according to the alternate flier rules or the ones used in gold?
2. The psychic power of the dominantrix and/or warlock titan says it can be used anytime in a combat phase, so even in CC the template can be placed upon enemy units despite being pinned? we played it this way and it does not feel overpowered, but maybe you know more.
3. Since the warlock titan does not get any orders he is allowed to place the orders in the moment it matters first. e.g. i decide to move the titan 20cm. -> this way my options are reduced to advance and charge orders. -> now i am getting snapped. -> now i can decide to get 2+ fixed save or use the 3+ fixed save, but may still fire in the advance phase. was this played the right way and if so does the "Warlock Aura" (the special card for 125 points) work the same way?
in addition we introduce more 40k elements in the game like the mission system and deployment rules which is rolled directly before the game.
this way your army has to be more flexible, plays out well.
thanks in advance