Trouble with Sereph the Diligent?

[Trash pubby]

I have yet to beat him a single time. At this point if I see I'm up against him I just restart the run. Anyone have any tips or advice?

[ShinryuEXE]

As always, for specific, targeted advice we'd need to see what decks you're building.
That aside and ignoring general advice that you can find in other topics, for Diligent specifically:
- Draw is very helpful. Mind you, draw is pretty much always good anyways, but especially with each Scourge card eating up one of your draws, having more draws helps ensure you can get down to your key cards faster. It also helps you avoid having to Consume a card you don't want to consume.
- Ways to kill or daze the Scourge generating units can make a big difference. It's certainly not necessary and usually my deck won't have a way to do this, but when it's a reasonable option it's great. The worst part of the Diligent fight is the Scourge cards since they mess up your deck and scaling so much, so being able to nullify those cuts out a large chunk of the fight's threat.
- Reduce the cost of more of your spells. You should be doing this anyways, but especially with the Scourge cards and with the first play being Consumed each turn, reducing more cards to 0 cost or at least 1 makes it easy to play out your spells even after having to devote a chunk of your energy to playing out the Scourges and makes you less likely to have to Consume a valuable card (because you can play out a 0 cost less important card first)

[caaARRroOLL]

i try to focus building strong units (multistrike, quick, largestone, etc etc), thereby negating the threat of having your spells consumed. also, the scourge generating units can be taken out quickly before they start to become a problem. its very easy if you have strong units.

if you have happen to be using spell heavy clans like Remnant/Stygian, then good luck! In this case, i try to load up on more spells than I normally would to use as sacrifice, and try to hellvent as many of my vital spells as possible. in games like this i have found that applying "spell weakness" and "frostbite" can be the difference in win or loss. There is a stygian unit with sweep that applies spell weakness...i always get it and try to multistrike it. And there is a spell that doubles the amount of ALL frostbite on the floor applies it to one unit. All that being said, spell weakness is probably your best bet. apply as much to seraph as possible and hit with high damage spell, preferably one with Attune and as many magic power gems as possible. 2k plus hits can be engineered fairly consistently.