Have you read
the unabridged guide yet? It goes over pretty much everything you're after in better detail than the forum version.
For specifics on the situation...
1) TV, specifically the History Channel. Unless you can get a basic cable package with locals and History plus basic internet access for under $65/month (not introductory priced), you might be better served with a basic internet connection, rabbit ears (or attic areal - check
TV Fool to see what's needed), a Roku, and a
Sling TV subscription.
2) For internet, though WoW patches can be massive, they download in the background via peer to peer. With most gaming, speed doesn't matter that much, latency does - even dial-up provides enough bandwidth for most games. Considering you can stream HD video with 7Mbps, and the high end of SD streaming video at 480p is still plenty watchable itself at 2.5Mbps...
TOAST.net, if she's in an AT&T Uverse area, offers 6Mbps VDSL service for a $50 install, only a one year contract and a flat monthly rate of $38/month that isn't a discounted introductory. If she's willing to sacrifice HD video and go with the History Channel streamed in SD, their (unlisted) VDSL 3Mbps package is $32/month. Also check out Earthlink cable internet prices if she's in a Comcast or Time Warner area.
3) Phone. The iPhone 6 with Verizon is carrier unlocked, and can be taken to
any Verizon LTE capable, AT&T or T-Mobile MVNO. If coverage is a concern switching networks, AT&T would be a safer bet. Regarding MVNOs specifically, if she doesn't use the phone for many calls texts and data, Consumer Cellular would be a good option as they're one of the only good AT&T MVNOs that are blessed by Apple to support data and MMS on the iPhone, especially if she's with AARP as she can get an additional discount. There's cheaper AT&T MVNOs with "unlimited" talk and text plans at $20/month, but they don't support MMS on iPhone, and data settings are a bother to set and reset and reset and reset with every software upgrade. Do her a favor and keep her away from Straight Talk, NET10, Tracfone, Page Plus, and Total Wireless... if you've ever dealt with their customer support, you'd understand why. You want something that works, first off, and has good support and billing, second. To keep data usage to the minimum needed, make sure software and OS updates are restricted to update over WiFi only, and disable mobile data access on all unnecessary mobile apps.
If TOAST.net VDSL is an option that's used, and you decide to bring a "home phone" back in to keep mobile minute usage low, mind that the AT&T modem/router/WiFi equipment does a right nice job of blocking VoIP (surprise surprise) - as such, you'll need to find directions to put the model of modem/router they send out into full bypass mode and stick a proper router in behind to fix that.
Done right, you should be able to get her set up for around $75-80 a month tops, and it's possible to get even lower depending on the options locally.