Hello fellow healer with high ping! I've been playing with 200-260 and healing just fine, savage included. It simply takes some getting used to. Precasting is your friend, trust tetra and rarely trust the bene. Swift cast your holy but give it a second before you hit that delightful bomb of light. Meld as normal. Dodging aoed will be way more unforgiving but consider you should be able to start moving while your cast bar is on 75% ! Good luck.