In your Alpha Strike games (or TW, for that matter), do you let Elementals pre-board OMNI Mechs before the OMNI Mech walks onto the table?
If yes, does saying "these Elementals board this Mech" count as a Move in the Movement Phase? i.e. Move 1: Elementals board the Mech that isn't on the table yet. Move 2: Mech walks onto the table with Elementals already onboard. Or, do you consider boarding the Mech to have happened before the game started, i.e. Move 1: Mech walks onto the table with Elementals already onboard?
Our group has found that this is very significant as it means that moving a Supernova onto the table takes either 5 or 10 "moves", which is a big deal. If it's 5 moves, the other player will have to double move far more often.
We have been playing it as if the Elementals boarded the Mech before the game started, so it's only 1 Move to walk both units onto the table. Otherwise, any Mech expecting to carry Elementals has to stop within the first 6" of the map else leave behind the Elementals. And it also means 1 whole round of not much happening.