HOW ABOUT UPGRADING TOWERS WITH ITEMS
Upgradable turrets would give players the option in how they like their towers to work. Want your towers more durable? No problem buy them some armor. Want them to have more Damage no problem get them a weapons upgrade, or how about some more range? Sick of seeing your tower being whittled down by constant shoving and want to buy them some health regen now you can. Tired of your team not using you splipush prowess to pressure objectives how about you upgrade a line of turrets to give minions a temporary buff!
Have players be able to upgrade their turrets in the shop by spending gold. Via a tab in the shop players can select turrets, from there players can select which line of turrets to upgrade, outer, inner, inhibitor and nexus turrets. Upgrades would cost an appropriate amount of gold. Upgrades can be a items for example;
Defensive Items, like giving turrets a selection of items players can buy for them, this could be aura items like aegis, minion buff items like banner where it would buff a minion whom passes by. Other things could be stuff like a shield generator. Or maybe a thornmail or whatever these items may be, these items would ofcoarse have buildpaths, items bought apply to all turrets in that specific line, example; you buy health regen item for all outer turrets, or increased vision range.
Offensive upgrades Like buffing its range or damage, but also altering its attack behavior and type of atacks, think about stuff like splash damage or turning its damage into magic damage. But also increasing the overheat capacity or the way it attacks, lasers, or slow firing large heavy hitting aoe blasts, or fast attacks, or allowing it to hit more than one target (splitting it's attacks and damage)
Both types of upgrades come in the form of items so turrets can only have 6 upgrades each.
The balance in this turretbuff is that you either spend gold on turret upgrading or buying items for your champion. But contrary to champions, when turrets are dead they wont just respawn on the fountain :)
