My all-comers 2.4k OnG list has a 40-strong unit of Blorcs. They are far and away the stars of the army, having taken out no fewer than 3 hydras in 2 games, smashed units of flamers out of buildings twice in successive turns, and generally brought the pain to anyone they fight against. I have a couple of fanatic-loaded NG units who usually take guard duty to deter flankers (I make no secret of the fact both units are fanatic-stuffed, to discourage flank charges), as my Bus of Blorcs obviously has long flanks. However, I'm wondering whether it is worth switching them to a horde formation. They are very destructive, but I fear the loss of rank bonuses, although I do think the extra damage they can cause might outweigh this. I tend to run them basic, without shields (Every point is precious!). The only boost they get is a Blorc Big Boss with a Gold Sigil Sword (Heh!) and the talisman that gives a 6+ ward against war machines.
Does anyone have any tips?