Honestly.. ur not gonna really notice the difference either way but..
Depending on who and what classes you are playing with(inb4 ur a solo player in which case u shouldn't play mage)
if ur playing ur class right darkweave is better in all situations aside from fc , damage is really low in this bracket so more often then not if ur in a position where you are going to die its probably unavoidable regardless of ur hp ( and probably more beneficial if youd just die anyways)
you should only be dying if
1. ur healers are bad dead oom or nonexistent
2. ur lack of awareness has gotten u lost in the gulch where u stand no chance at surviving
3. you have fallen behind or sacrificed urself kiting on defense
4. the other team has 10 hunters and 10 rogues all focusing you
none of those situations are u gonna be like damn I wish I had 40 more health XD
the more likely scenario is you will run out of mana long before u run out of health so try to get 1k-1.2k hp and then get as much int as possible, or u can stack stam run oom and spend most ur time drinking when u could be ccing or doing dmg because the water at this lvl is awful
but at the end of the day you should build ur set around the skill and playstyle of you and the people you que with and not what someone else thinks... if you die a lot build stam if you never die build int / sp
this is a good standard set
https://gyazo.com/60a59001139e56233bea05eff2da51e0