I kept an LDR void with double down and field scout. I bought the stock arc LDR with Unflinching and Armor Piercing, and I also bought the stock Longbow with Field Scout and Solar. But I rarely use them since I got 3xEfrideet's Spear in one of the TDB Iron Banners and rolled them arc/solar/void all with field scout. Eventually I will probably delete the LDRs for space reasons, but the Longbow has such fantastic stability that I will probably keep it for PvP even after TTK drops.