My opinion, dev should use some of the premine to run a giveaway of say, 50k DEL.  Run a few week long vote on which coins deserve to be deleted the most.  Every coin is on the table.  Each coin gets its own corresponding unspendable DEL address (they are the first to be deleted).  Purpose of the giveaway is to allow people to vote without having to mine or buy any, in the interest of fairness.  But every DEL you mine or buy gives you more votes.  Every DEL you delete equals a vote.  After a set time frame, the top 25-50 coins that are voted for being deleted are deemed to be the targets of DEL.

Possibly revisit this voting scheme every 2-3 months to allow new coins to enter the crosshairs, and old coins the community has changed its mind on to no longer be targets.