1) 33 stamina worth of gem bonuses lost due improper gemming. Can be justified if you only gem for stamina but you are not.
2) Gem stamina in blue slots, hit/sta in yellow slots, dodge/sta in red
3) Don't be afraid with loss of hit, just have hit dps trinket ready when it really matters, have some hit/sta food @ disposal.
4) you have great gear and it's fine as it is, geming overhaul will bring more stats to the table but wont hurt even if it stays this way.