to join the clan just click this link and join on your platform(s) of choice
FOH Clan | Bungie.net
getting light level past 265 is tricky, and you can easily fuck up and mess it up. Its a combination of SOME engrams being "higher" than 265 - exotic engrams and specific quest rewards and weekly challenge engrams give higher level, so you want to save even LOOTING those (item levels are locked once they go into your inventory) until you are 265. If you fuck up and for example do the quest to do ~10 crucible games before you are 265, you will get an item below 265 and fuck yourself out of higher gear. The second thing is that the mod slot can add 5 light level to an item, but the power level of an item is considered without the mod. Its very confusing and tricky especially when it comes to infusions, there is a long explanation in the "road map" I link below.
The tl;dr version of min/maxing is this: level from 3-20 just doing public events and patrols on EDZ, don't do any quests. You will get tons and tons of coins. The second you hit 20 you can do the main campaign, it works 100x better on alts since you can infuse 265-275 blue gear from your main into your alt the second he hits 20. The quest drops you get from the last few quests will drop at your highest alt light level so having 270 gear will make it nice.
Now, main or alt, you want to just grind public events - Titan is easy - until you are light 265. You can supplement it with Lost Sectors while PEs are down, they will drop 1-2 blue items every time and take 5 mins. Try to unlock heroic public events if you can, higher shot at exotic engrams. Don't "save" engrams from PEs, go to the tower and unlock them immediately since they are level locked at drop. Save all those coin/token things. Once you are 265, blow through the tokens and you will maybe make it up to 267, 270, 271 depending on how lucky you get with mods and exotics.
Now you want to start doing all the challenge stuff (do 10 crucible, do a few strikes, do public events, etc) and the exotic weapon questlines (1 per planet, start with the blue quest) and you can do nightfall and loot the special engrams, like the clan engrams, ikora's engrams, caydes engrams, and loot cayde's special treasure chests. These items drop at like 10-15 light levels higher than your current max. Once you hit 280, you can buy power mods from the gunsmith that add 5 light to every item.
You do NOT need to roll and delete multiple chars though, I am light level 283 on my warlock and I have only one char, my alt is only level 3 and I just started him yesterday after finishing everything on my main. The only people doing that are those trying for world first on the raid, and are trying to be close to 300 light. Past 285 light is going to require alt rerolls in the first week, but just doing the raid next week will probably get everyone closer to 300.
Basic tips to max power (light level) in D2, pre-raid: