Lifesteal is honestly overpowered, and it has been for a long time.
At the very least it should not stack at all (Warlord's+LS item being the main culprit) and it should be reduced vs minions. The highest value should take priority in all cases and that's it.
If Mages burst healing (and its variability between champions) was an issue, ADs healing is a huge issue as well, due to any physical on-hit being included in lifesteal values.
Some games are won solely by someone stacking lifesteal on Yas (whether its item+warlord's or whatever else), Riven, or whatever ADC. They can make the worst plays and come out of it solely due to healing over 1/4 of their HP any time they touch something. That is the opposite of interactive.
which is 2100g more expensive (yes better stats but takes ages to build) AND you need to get the enemy below 40% health for GW to actually work.
, healing is almost nullified once they drop below the threshold.
old (sry couldnt resist the pun)
then that's your team's fault
45 mr
since that's a specially case. Making it a lot easier to predict how strong it is while being able to balance it a lot easier. With Spellvamp it was really hard to know whether or not it was too strong or too weak more often than not

.