Mark thoughts
Mark is really good for aram. It gives champions that were unviable (mostly melee tanks or bruisers, or squishy assassins) to actually partake in initiation or getting a chance to be apart of the game. The spell has good counter play because of how slow it travels. So, people who get stuck with rammus, volibear, singed after feel relevant and even udyr. The problem I experience time and time again is the enemies would always have vast amounts of cc such as slows, roots, stuns. etc. which made initiating impossible and completely ruined the opportunity for those champions to be viable in the gamemode. I normally am against mobility but everyone knows that feeling of getting udyr and face palming because you knew you were 90% of the time useless to your team. It's also good for champions that already did fine with flash but relied heavily on flash so were truly useful only 4 times a match. (5 mins per flash ish avg game 20 mins)
My only complaint on mark is the cool down is ridiculously low. Mark serves as an offensive summoner ability that should probably land in the 45 second to 1 min cool down area. The enemy should not be bombarded by mark endlessly. It should not be a skill you throw around hoping to hit somebody just so you go in. It should be planned and executed as if you were using a longer cool down summoner spell. Mark is valuable for initiation, assassinating, and all over just catching up to an enemy. It should be used in it's most valuable uses. Not tossed around because the cool down is low. That's my only problem. Usually I am really upset with changes riot implements but this is actually something that was much needed and healthy for aram. Really impressed now please nerf the damage a bit and increase the cool down.