Non-uniform spacing in table of contents (XeLaTex book, tocloft, Indic script)

Question

I am typesetting a book in XeLaTex (TexLive 2012 on Windows) in Sanskrit. I am using the tocloft package for table of contents. I want the font size to be bigger in the TOC, for which I use the following

\renewcommand\cftchapfont{\LARGE\bfseries}
\renewcommand\cftsecfont{\Large}
\renewcommand\cftchappagefont{\LARGE\bfseries}
\renewcommand\cftsecpagefont{\Large}

However, this has the undesired side-effect of making the spacing between section entries non-uniform. The spacing is now different depending on the glyphs above or below the characters. When I remove the above four lines, the spacing is perfectly uniform, but the default font size is too small. Any idea how to increase the font without impacting the spacing?

Here is an MWE.

\documentclass{book}
\usepackage{titlesec} 
\usepackage[titles]{tocloft}
\usepackage{polyglossia}
\usepackage{fontspec}
\setmainlanguage{sanskrit}
\setotherlanguage{english}
\setmainfont[Script=Devanagari]{Arial Unicode MS}
\newfontfamily\devanagarifont[Script=Devanagari]{Arial Unicode MS}
\newfontfamily{\englishfont}{Times New Roman}
\newcommand{\devanagarinumeral}[1]{%
  \devanagaridigits{\number\csname c@#1\endcsname}}
\renewcommand\cftchapfont{\LARGE\bfseries}
\renewcommand\cftsecfont{\Large}
\renewcommand\cftchappagefont{\LARGE\bfseries}
\renewcommand\cftsecpagefont{\Large}
\usepackage{hyperref,bookmark}
\hypersetup{colorlinks,linkcolor=blue}
\pagenumbering{arabic}
\renewcommand{\thepage}{\large \devanagarinumeral{page}}
\begin{document}
\tableofcontents
\pagebreak
\chapter[कृत्तद्धितप्रकरणम्]{कृत्तद्धितप्रकरणम्}
\section[जगताम्]{जगताम्}
\section[अध्यात्मरामगङ्गा]{अध्यात्मरामगङ्गा}
\section[भक्तेषु]{भक्तेषु}
\section[मे]{मे}
\section[कथयिष्यामि]{कथयिष्यामि}
\section[ब्रूहि तत्त्वं]{ब्रूहि तत्त्वं}
\section[मया]{मया}
\chapter[धातुप्रकरणम्]{धातुप्रकरणम्}
\section[राज्यदानम्]{राज्यदानम्}
\section[पूर्णेन एकत्वम्]{पूर्णेन एकत्वम्}
\section[साक्षात्कथितं तव]{साक्षात्कथितं तव}
\section[तेऽभिहितम्]{तेऽभिहितम्}
\section[पुरा मम]{पुरा मम}
\section[प्राह]{प्राह}
\section[कश्यपस्य वरो दत्तः]{कश्यपस्य वरो दत्तः}
\end{document}

Answer 1

You can insert \usepackage{setspace} in the preable and then use something like this:

\begin{spacing}{1.6}
\tableofcontents
\end{spacing}

Alternatively, you can put \renewcommand{\baselinestretch}{1.8} before \tableofcontents. This method was suggested for a similar problem in this post.