Well, I can say your alacrity can be sacrificed for power/surge mods. 14% is a little high, and I tend to keep mine down around 9% which gets my KI cast to about 1.8 seconds. Most of what you rely on to heal does not use alacrity, so it's better off in power, which is where the big green numbers are going to come from. Your crit is fine, I wouldn't invest much more into it.
Your HoT isn't the strongest thing, but you're not relying on it for heal strength so much as TA procs. Mine ticks for about 1.4k on a crit. What you should be relying on his juggling your free heals with your KI. Our AoE heal is expensive and situational. So on the stack phase of Annihilation Droid, After people run back from lava on Gharj, and on stair phase of Soa are the only places in EV you will probably need it. If there was heavy healing needed on puzzle, it wasn't your fault. It was your groups fault for taking more than two minutes to complete puzzle.
I'll tell you n all honestly, you will be remodding a lot of the stuff you get from the tier vendors as the itemization is not optimal for our class. So, as far as advice goes, just keep trying to get your columi gear, sacrifice some of that alacrity for power/surge, and don't let terrible groups get to you. Even if they blame you, it may not be your fault in the first place.