Editing Warhammer 40,000/9th Edition Tactics/Thousand Sons (section)

===Cons===
* Although the sculpts are quite good, the overall range of units to choose from is small.
* Consistently miss out on new releases due to keywords, leaving you frustrated to see other Chaos getting new toys you can't use.
* Magnus is a huge investment of money, time, and points.  He costs a lot, and you will want to put a lot of buffs on him to make sure you make the most out of him, otherwise he's just a gigantic target for your opponent.
* Reliance on your Psychic synergy means anti-psyker units like Sisters of Silence, Culexus Assassins, GSC unwilling orb and Tyranids (''especially Hive Fleet Kronos'') will give you no end of problems if not eliminated quickly.
* Some models were ported in from Age of Sigmar in lieu of getting new stuff like the Death Guard, which is a con due to the fact that the models don't look at all like they belong in a 40k setting.
* Your HQs are your biggest threat as well as the linchpin of your buffs, meaning most people will focus on them first. If this happens your army can take a huge hit very quickly and struggle to recover.
* The Thousand Sons have a very limited armoury and find it hard to access plasma and melta weaponry. Also, they lack any real anti-tank outside of tanks and daemon engines, with their primary alternatives consisting of either literally just smiting them to death (which, while awesome, is not recommended) or an enmassed, Malefic Maelstrom'd Wrath of the Wronged Scarab Occult Terminator squad (which is argued to be the second strongest anti-tank in the army besides the Vindicator Laser Destroyer; thanks to swinginess of other available options).
* You can also cripple your army on your own, as constantly casting means a high chance of rolling Perils of the Warp and blowing yourself up. Though this had been mitigated with a 1CP strat.
* Possibly the biggest con of the Thousand Sons in 9th is a couple of the secondaries: Abhor the Witch and Assassinate are ''so'' strong against the Thousand Sons that they have been consistently described as "a free maxed-out secondary". With so many of their units being psykers, Abhor the Witch is often comically easy to score, and many of our psykers being characters (and often bringing 4+ of them) makes them both count for more points for Abhor the Witch and valid Assassinate targets (and yes, you absolutely can score both off of one model).