


Just as others said I wouldn't panic, both of these skills are channels, which in turn makes it impossible to use other skills during that time, it doesn't allow for blocking or roll dodging, making the caster a sitting duck. Both of them also require accurate targeting as they have a fairly narrow range of action, which in combination with the need to stay in motion, which is an integral part of PvP, will pose some problems.
Edit:
On the other hand, if the HPS (healing per second) is strong enough, it may lead to a situation where killing the arcanist will be close to impossible, and a duo consisting of the arcanist as a healer and another character as a damage dealer can be problematic.
2 words
crushing shock