"Though it might sound unpleasant, I must advise that we seize the opportunity before the Human Faction fully mobilizes, to broaden the initial campaign and seize the neighboring land countries. By destroying Albion's naval and air forces and making them lose the capability to intervene, Ros United Duchy will also be deterred from any rash actions."
In other words, it's better to commence the war sooner rather than later. Once basic preparations are done, a blitzkrieg should be initiated immediately. Otherwise, the longer it drags out, the accumulation of uncertain factors would directly affect whether strategic objectives can be achieved.
At least a self-sufficient continental system needs to be established for Alfheim as a nation, so it wouldn't be at a strategic disadvantage.
From a purely military perspective, Admiral Dilaz's proposed war strategy has some feasibility. However, at the full scale strategic level, this plan could lead to a catastrophe.
