duel on a ice island is one of my favourite things when i play online with my friend, because this map is cool. just cool. there are a lot of extractors, a lot of space, and a water around. and that tactic is great for every map, except for 8p and king of the middle.
first, take all extractors that you can, and build basic defence:
do not forget to grow up your defence:
and remember:planning a good attack as important as a good defence. you dont need a hundreds of gunships, hovertanks.
your army must be used to defence territory as well, because each defence can be defeated. that is only a question of time. create a reserve army:some interceptors, battleships and tanks. that will greatly help you, i garant that. army camp ex:
remember about mid? and a tip: do not push enemy's middle defence. try to bit of his less defended part and take control on it. im really tired to write that, im writing at 00.34. so short: here is tactic in a picture
if you want to win, edit that tactic under your enemy: play more aggressive or defend. marks and lines: blue zone is your factory zone. big black spots are your army factories. red lines are ex. of def patrol units placement. green lines are defence lines. half-visible green lines are probably occupation zones. sorry for t9 @nd grammar.