How about allowing skarner to place his own crystal spires ?

the mechanic in itself is rather good ... you create a long lasting zone you cotnroll

but there is one thing ... by placing it on the map permanently you made it so it can work for enemy team isntead for skarner

also the fact that they are centered around neutral objectives ... pls no ... this enforces only team wide snowballing ... either for skarner or his enemies

how about creating some anchor points on the map and allowing skarner to raise his spires just like azir raises his turrets