Rdps and Mdps- balance idea

[Onyxys]

Lets see, for example, Coil 1-2.
-----On snake Rdps need to worry only about poison shooting of the snake, but Mdps + this need to worry about tail hit and it is very dangerous because ping+server latency
------Coil 2 Rdps need to worry only about laser and other range attacks, but Mdps +this need to worry about round AOE. Many players know, that it is VERY hard to run out from this round AOE because ping+server latency. So, why not to make some boss balance and skill balance as I suggested to make Mdps classes more attractive?