conduit attack buff

Conduits should be able to attack hostile mobs in a larger range, an 8 block range at max level isn't very useful and it does very little damage in a long amount of time. 

At lowest level (16 blocks) the conduit should attack one mob for 4 damage in an 8 block range every 2 seconds, as it does now.

Then at 21 blocks the conduit should attack one mob for 5 damage in a 16 block range every 2 seconds.

Then at 28 blocks the conduit should attack one mob for 5 damage in a 24 block range every 1 second.

Then at 35 blocks the conduit should attack one mob for 6 damage in a 32 block range every 1 second.

And finally at 42 blocks the conduit should attack two different mobs for 6 damage in a 40 block range every 1 second. 

This scales with the regular leveling up of the conduit and makes the attack far more useful, possibly even for farms.