On a purely speculative note, I wonder if relatively-disengaged voters pick among available parties at near-random, thus implicitly favoring small parties over broad coalitions.
In which case, the optimum tactic for a political alliance might be to register as several parties, but with the same electoral list. There is, at a first glance, no rule I see against people appearing on the electoral lists of more than one party. (Or, actually, even against for multiple parties having the same party leader.)
The natural checks on artificial use of this tactic are 1) having to pay a registration fee for each party; and 2) parties that look obviously "spammed" (particularly in having the same party leader) will probably turn off voters.
In which case, the optimum tactic for a political alliance might be to register as several parties, but with the same electoral list. There is, at a first glance, no rule I see against people appearing on the electoral lists of more than one party. (Or, actually, even against for multiple parties having the same party leader.)
The natural checks on artificial use of this tactic are 1) having to pay a registration fee for each party; and 2) parties that look obviously "spammed" (particularly in having the same party leader) will probably turn off voters.