What are sustain blockskills? We have the fewest amount of SA and iframes out of all classes, granting us almost no recover time on our blockbar. Without E-Buff(FG-Sprint) there is no way to win against an archer as he just jumps back the same distance you cover towards him with the few protected dashes valk has. You simply can't reach him and unless you have full pen armor, your block is 2-3 shot. If I(331 DP 2 tet narc 2 pen ronaros level 4 tet armor) for example just use my jump on spot to buy cd time and recover block against a "two distortion earring-archer", I lose something like 50-80% of my HP getting hit during the SA. We can make 2 SA dashes followed by 3 FG(nonawakening FG, which is onehit) before we are out of safe movement options. The fg dashes can not even be used as they break in 1 single hit and will get you cc'ed. The only chance of reaching the archer before the FG is gone is with E-Buff.