Here is what I think:
Ghostly weapon- I think dried cactus is a better option. If your thinking like this is an item and not a potion then how would that make armor pen permanent. If its a potion, given thats its a yellow one, I think the figures are a little high. This would totally phase out Knux.
Tracer shot- sounds more of an item than a potion. Nice idea though. One thing though, if its refreshed by attacks then there is no need for the duration seeing as the tower would likely focus on it until it dies.
Potion of teamwork- should only affect aura effect items seeing as this would definitely go to Mr. Iron since he could incorporate both aura and single-tower items. Too OP. Will make the game mega easy.
Stun Grenade (both 1&2)- better off an item than a potion (with a little higher %chance if its an item- maybe 10%). Or make it purple with a fixed %chance (maybe around 15-20%). Imagine PERMASTUN (permanent stun). OP?
Dual Stat pots- its a great idea for me. Cant comment on the figures. Maybe a trial could be done (a beta run or something of that sort) to determine the balanced figures for this as to prevent it from spoiling or outclassing single-stat pots.
Thanks for the feedback ^_^
I have no idea how to balance a game, so for the most part, I was guessing on stat rates based on somewhat-similar items/potions, when there were any, beyond that, it was cold-guessing
Options to fix; with the grenades, there could either be a cap to stun chance, or reduction of creeps hit to, say, 50%, at random, of the creeps in range
Ghostly weapons could certainly be nerfed (it was intended to be a potion, because as you pointed out, there is already an item with that ability), I was just guessing on that, the ability was what I was aiming for, moreso then the particular stat %. It could also have a capped %, alternate armor reduction on hit (one hit with reduced armor, the next without) assuming that's not a terribly difficult modification, or whatever.
The reason I put a duration on tracer shot was that creeps go out of range, and just to say the tower with the item/potion no longer has any other creeps in range, the already-hit creep could retain the debuff to the exit, but I thought that, like the unrelenting force, terminating the debuff would probably be a better option, to prevent massive damage on a boss, just to say, when it shouldn't really be getting it anymore because the leader no longer has it in sight, and I'm assuming the towers have a relatively short attention span, and need to constantly be told what to do. ~_^ Another option for that potion would be to force all towers within range to target "The Enemy"
Potion of teamwork was really an afterthought.. I thought it was a bit OP, as well, but I figured it might be an OK base for an idea for others to build on... perhaps a clause that that potion cannot be used on mr. iron could fix that issue? I could see it being way OP even if it's just for the aura items if mr. iron got his cyberman hands on it, and just had stacks and stacks of aura items incorporated.. but for any other tower, I can see this being exceptionally useful (perhaps "exceptionally useful" translates to "OP" :P )
Totally thrilled that I'm not the only one who would like/use dual-stat pots ^_^ I find it limiting that I have to choose between stats when I want to buff multiple towers.. I have a short attention span, and frequently forget which stats I've pot-buffed and which are only item-buffed, and I'm far far too lazy to do the math to figure it out :D
Nope Mr. Iron is not OP even aftr consuming many aura items. And with regards to the Dual stat pots, i like it because it means more pots for my carry. I dont give other towers pots. I spill it all on one tower.. haha