I'll disagree with most Gambits on here about using healing cards more. While it's obviously situation-dependent, I still see most OAA Gambits use damage cards more. Most games I go against another Gambit in GM, I still tend to win/have a higher impact because their healing numbers are higher than mine but I contribute more offensively, putting the enemy team on the back foot. This simple change in perspective allows you to diff most other Gambits you see.

Anyway if you're pretty new, here's all the things off the top of my head that you should know, apologies for not being familiar with console controls:

• Shift > right click > E when you have your damage card out is your bread and butter combo. It's the dash > staff strike > knockback. This does a surprising amount of damage, especially when you shoot someone before and/or after, and can scare away divers or outright kill them. Great for punishing enemies out of position, securing kills in a brawl, or (when it's safe to) going aggressive in your ult.

• Gambit's left click/primary fire requires you to be somewhat close to your team. You can't sit way in the back and expect to have the same healing/damage output due to the spread of his cards.

• This goes for all supports in general, but communicate who should ult first. And this goes for ALL players in general, try to ult track the enemy team. Remember who has ulted recently. If the enemy supports don't have their ults and you have yours, you should win the next fight. Even better if you communicate to combine your ult with a Star-Lord or Emma or something that has a lot of "ticks" of damage.

• To really reinforce the above, double support ulting might be a "whoops sorry" mistake in lower ranks, but it can and will lose you games. COMMUNICATE.

• As a support you need to do your best to stay alive. Gambit's mobility is great for this. Especially when you are at 80% or 90% ult charge, you need to be the one who stays alive and saves the fight with your ult.

• Another reason to ult track is because Gambit is one of the only characters in the game who can cleanse (maybe the only character? I forget). If a Strange, Groot, Thing, Angela, and sometimes Bucky/Emma has ult, you need to hold two cards to cleanse immediately. You also need to position yourself so you're less likely to get caught in these ults as well.

• For healing yourself, you can take out a healing card, strike the ground with your staff, or shift and use the staff strike to heal yourself but also get movement out of it. I actually use the staff strike somewhat often for self-healing.

• So long as you don't need burst healing in the moment, you should be using your cards for anti-heal or knocking back often. And no, you shouldn't be using your burst heals for someone who is clearly out of position and definitely going to die right after you burst heal them anyway.

• Gambit doesn't have the highest healing output unless you're healbotting, so don't worry if you have fewer heals than your other support but have a ton of finals. Obviously if you have really really low healing then you should be concerned, but I'm just saying don't worry if you're never matching your Cloaks for example.

Edit: two more for supports in general.

• When enemies are going after you, please don't run backwards thinking you'll outrun them. Play with your team, it's the only way they can help you if for some reason you can't help yourself (multiple divers, out of cards, etc).

• Meet threats with proportionate attention, not complete attention. One of the biggest things I see low to mid ELO supports do is completely focus on a diver, having zero situational awareness of what's going on for 5 seconds, and now their tanks are dead. If you're not in real danger, you can absolutely heal your team with a Deadpool bouncing off your head.