Quick and Easy Questions (please read the OP)

[Gilgamesh]

Bloodlust – Tier 1 Super Utility – 600 OM (requires Buff Proficiency, Ranged)
Rehgar digs deep before infusing his allies with a berserker strength, granting any friendly characters within 10 metres a buff. The stat boost of ATK+3, SPD+1 is spread between the number of allies.
Omni's Note: Super Moves that give your allies stats may grant up to 4 stats per 1 SP (ie, it depends upon the tier of the move) per post. Alternately, you can increase the duration, by reducing the number of stats granted accordingly. For example, you could make it last a whole round, like a transformation, but you'd have to halve the stats granted (in this case, to +2). Stat are always spread between the number of targets.

If I wanted to make a similar super move and wanted the options of spreading across multiple people or halving the Stat to make it last a round would it still cost only 600 OM? Also could I spend 2 SP to make the +4 last for the whole round for this type of move. Lastly, If i wanted to improve it by making it a t2 or a t3 is it just then 8 stats and then 12 stats?